<?xml version="1.0" encoding="US-ASCII" standalone="no"?>
    <!-- Field: Doc-Info; Name: Generator; Value: GoFiler Complete; Version: 3.3c -->
    <!-- Field: Doc-Info; Name: VendorURI; Value: http://www.novaworks.co -->
    <!-- Field: Doc-Info; Name: Source; Value: espey06302012.xfr; Date: 2012/09/13T18:16:30 -->
    <!-- Field: Doc-Info; Name: Status; Value: 0x00000000 -->
<link:linkbase xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrli="http://www.xbrl.org/2003/instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
    <link:roleRef roleURI="http://espry.com/role/DocumentAndEntityInformation" xlink:href="esp-20120630.xsd#DocumentAndEntityInformation" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/BalanceSheets" xlink:href="esp-20120630.xsd#BalanceSheets" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/BalanceSheetsParenthetical" xlink:href="esp-20120630.xsd#BalanceSheetsParenthetical" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/StatementsOfIncome" xlink:href="esp-20120630.xsd#StatementsOfIncome" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/StatementsOfChangesInStockholdersEquity" xlink:href="esp-20120630.xsd#StatementsOfChangesInStockholdersEquity" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/StatementsOfCashFlows" xlink:href="esp-20120630.xsd#StatementsOfCashFlows" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/NatureOfOperations" xlink:href="esp-20120630.xsd#NatureOfOperations" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/SummaryOfSignificantAccountingPolicies" xlink:href="esp-20120630.xsd#SummaryOfSignificantAccountingPolicies" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/InvestmentInFairValue" xlink:href="esp-20120630.xsd#InvestmentInFairValue" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/ContractsInProcess" xlink:href="esp-20120630.xsd#ContractsInProcess" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/PropertyPlantAndEquipment" xlink:href="esp-20120630.xsd#PropertyPlantAndEquipment" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/PensionExpense" xlink:href="esp-20120630.xsd#PensionExpense" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/ProvisionForIncomeTaxes" xlink:href="esp-20120630.xsd#ProvisionForIncomeTaxes" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/SignificantCustomers" xlink:href="esp-20120630.xsd#SignificantCustomers" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/StockRightsPlan" xlink:href="esp-20120630.xsd#StockRightsPlan" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/EmployeeStockOwnershipPlan" xlink:href="esp-20120630.xsd#EmployeeStockOwnershipPlan" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/Stock-BasedCompensation" xlink:href="esp-20120630.xsd#Stock-BasedCompensation" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/FinancialInstrumentsconcentrationOfCreditRisk" xlink:href="esp-20120630.xsd#FinancialInstrumentsconcentrationOfCreditRisk" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/RelatedParties" xlink:href="esp-20120630.xsd#RelatedParties" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/CommitmentsAndContingencies" xlink:href="esp-20120630.xsd#CommitmentsAndContingencies" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/StockholdersEquity" xlink:href="esp-20120630.xsd#StockholdersEquity" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/QuarterlyFinancialInformation" xlink:href="esp-20120630.xsd#QuarterlyFinancialInformation" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/SummaryOfSignificantAccountingPoliciesPolicies" xlink:href="esp-20120630.xsd#SummaryOfSignificantAccountingPoliciesPolicies" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/SummaryOfSignificantAccountingPoliciesTables" xlink:href="esp-20120630.xsd#SummaryOfSignificantAccountingPoliciesTables" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/InvestmentInFairValueTables" xlink:href="esp-20120630.xsd#InvestmentInFairValueTables" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/ContractsInProcessTables" xlink:href="esp-20120630.xsd#ContractsInProcessTables" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/PropertyPlantAndEquipmentTables" xlink:href="esp-20120630.xsd#PropertyPlantAndEquipmentTables" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/ProvisionForIncomeTaxesTables" xlink:href="esp-20120630.xsd#ProvisionForIncomeTaxesTables" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/EmployeeStockOwnershipPlanTables" xlink:href="esp-20120630.xsd#EmployeeStockOwnershipPlanTables" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/Stock-BasedCompensationTables" xlink:href="esp-20120630.xsd#Stock-BasedCompensationTables" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/StockholdersEquityTables" xlink:href="esp-20120630.xsd#StockholdersEquityTables" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/QuarterlyFinancialInformationTables" xlink:href="esp-20120630.xsd#QuarterlyFinancialInformationTables" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/SummaryOfSignificantAccountingPoliciesDetails" xlink:href="esp-20120630.xsd#SummaryOfSignificantAccountingPoliciesDetails" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/InvestmentInFairValueDetails" xlink:href="esp-20120630.xsd#InvestmentInFairValueDetails" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/InvestmentInFairValueDetails1" xlink:href="esp-20120630.xsd#InvestmentInFairValueDetails1" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/InvestmentInFairValueDetailsNarrative" xlink:href="esp-20120630.xsd#InvestmentInFairValueDetailsNarrative" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/ContractsInProcessDetails" xlink:href="esp-20120630.xsd#ContractsInProcessDetails" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/ContractsInProcessDetailsNarrative" xlink:href="esp-20120630.xsd#ContractsInProcessDetailsNarrative" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/PropertyPlantAndEquipmentDetails" xlink:href="esp-20120630.xsd#PropertyPlantAndEquipmentDetails" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/PensionExpenseDetailsNarrative" xlink:href="esp-20120630.xsd#PensionExpenseDetailsNarrative" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/ProvisionForIncomeTaxesDetails" xlink:href="esp-20120630.xsd#ProvisionForIncomeTaxesDetails" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/ProvisionForIncomeTaxesDetails1" xlink:href="esp-20120630.xsd#ProvisionForIncomeTaxesDetails1" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/ProvisionForIncomeTaxesDetails2" xlink:href="esp-20120630.xsd#ProvisionForIncomeTaxesDetails2" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/SignificantCustomersDetailsNarrative" xlink:href="esp-20120630.xsd#SignificantCustomersDetailsNarrative" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/StockRightsPlanDetailsNarrative" xlink:href="esp-20120630.xsd#StockRightsPlanDetailsNarrative" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/EmployeeStockOwnershipPlanDetails" xlink:href="esp-20120630.xsd#EmployeeStockOwnershipPlanDetails" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/EmployeeStockOwnershipPlanDetailsNarrative" xlink:href="esp-20120630.xsd#EmployeeStockOwnershipPlanDetailsNarrative" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/Stock-BasedCompensationDetails" xlink:href="esp-20120630.xsd#Stock-BasedCompensationDetails" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/Stock-BasedCompensationDetails1" xlink:href="esp-20120630.xsd#Stock-BasedCompensationDetails1" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/Stock-BasedCompensationDetailsNarrative" xlink:href="esp-20120630.xsd#Stock-BasedCompensationDetailsNarrative" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/FinancialInstrumentsconcentrationOfCreditRiskDetailsNarrative" xlink:href="esp-20120630.xsd#FinancialInstrumentsconcentrationOfCreditRiskDetailsNarrative" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/StockholdersEquityDetails" xlink:href="esp-20120630.xsd#StockholdersEquityDetails" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/StockholdersEquityDetails1" xlink:href="esp-20120630.xsd#StockholdersEquityDetails1" xlink:type="simple" />
    <link:roleRef roleURI="http://espry.com/role/QuarterlyFinancialInformationDetails" xlink:href="esp-20120630.xsd#QuarterlyFinancialInformationDetails" xlink:type="simple" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/DocumentAndEntityInformation" xlink:title="0001 - Document - Document and Entity Information" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/BalanceSheets" xlink:title="0002 - Statement - Balance Sheets">
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InventoryNet" xlink:label="loc_espInventoryNet" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InventoryRawMaterials" xlink:label="loc_espInventoryRawMaterials" />
      <link:calculationArc order="100" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espInventoryNet" xlink:to="loc_espInventoryRawMaterials" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InventoryWorkInProcess" xlink:label="loc_espInventoryWorkInProcess" />
      <link:calculationArc order="200" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espInventoryNet" xlink:to="loc_espInventoryWorkInProcess" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InventoryForLongTermContractsOrPrograms" xlink:label="loc_espInventoryForLongTermContractsOrPrograms" />
      <link:calculationArc order="300" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espInventoryNet" xlink:to="loc_espInventoryForLongTermContractsOrPrograms" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="loc_espAssetsCurrent" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_espCashAndCashEquivalentsAtCarryingValue" />
      <link:calculationArc order="100" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espAssetsCurrent" xlink:to="loc_espCashAndCashEquivalentsAtCarryingValue" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MarketableSecuritiesCurrent" xlink:label="loc_espMarketableSecuritiesCurrent" />
      <link:calculationArc order="200" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espAssetsCurrent" xlink:to="loc_espMarketableSecuritiesCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="loc_espAccountsReceivableNetCurrent" />
      <link:calculationArc order="300" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espAssetsCurrent" xlink:to="loc_espAccountsReceivableNetCurrent" xlink:type="arc" weight="1" />
      <link:calculationArc order="400" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espAssetsCurrent" xlink:to="loc_espInventoryNet" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsNetCurrent" xlink:label="loc_espDeferredTaxAssetsNetCurrent" />
      <link:calculationArc order="500" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espAssetsCurrent" xlink:to="loc_espDeferredTaxAssetsNetCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="loc_espPrepaidExpenseAndOtherAssetsCurrent" />
      <link:calculationArc order="600" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espAssetsCurrent" xlink:to="loc_espPrepaidExpenseAndOtherAssetsCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Assets" xlink:label="loc_espAssets" />
      <link:calculationArc order="100" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espAssets" xlink:to="loc_espAssetsCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_espPropertyPlantAndEquipmentNet" />
      <link:calculationArc order="200" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espAssets" xlink:to="loc_espPropertyPlantAndEquipmentNet" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NotesAndLoansReceivableGrossNoncurrent" xlink:label="loc_espNotesAndLoansReceivableGrossNoncurrent" />
      <link:calculationArc order="300" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espAssets" xlink:to="loc_espNotesAndLoansReceivableGrossNoncurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_espLiabilitiesCurrent" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:label="loc_espAccountsPayableCurrent" />
      <link:calculationArc order="100" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espLiabilitiesCurrent" xlink:to="loc_espAccountsPayableCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccruedSalariesCurrent" xlink:label="loc_espAccruedSalariesCurrent" />
      <link:calculationArc order="200" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espLiabilitiesCurrent" xlink:to="loc_espAccruedSalariesCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccruedVacationCurrent" xlink:label="loc_espAccruedVacationCurrent" />
      <link:calculationArc order="300" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espLiabilitiesCurrent" xlink:to="loc_espAccruedVacationCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherEmployeeRelatedLiabilitiesCurrent" xlink:label="loc_espOtherEmployeeRelatedLiabilitiesCurrent" />
      <link:calculationArc order="400" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espLiabilitiesCurrent" xlink:to="loc_espOtherEmployeeRelatedLiabilitiesCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccruedPayrollTaxesCurrent" xlink:label="loc_espAccruedPayrollTaxesCurrent" />
      <link:calculationArc order="500" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espLiabilitiesCurrent" xlink:to="loc_espAccruedPayrollTaxesCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccruedIncomeTaxesCurrent" xlink:label="loc_espAccruedIncomeTaxesCurrent" />
      <link:calculationArc order="600" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espLiabilitiesCurrent" xlink:to="loc_espAccruedIncomeTaxesCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesNoncurrent" xlink:label="loc_espLiabilitiesNoncurrent" />
      <link:calculationArc order="100" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espLiabilitiesNoncurrent" xlink:to="loc_espLiabilitiesCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxLiabilitiesNoncurrent" xlink:label="loc_espDeferredTaxLiabilitiesNoncurrent" />
      <link:calculationArc order="200" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espLiabilitiesNoncurrent" xlink:to="loc_espDeferredTaxLiabilitiesNoncurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="esp-20120630.xsd#esp_TotalStockholdersEquityBeforyEsopAndTreasuryStock" xlink:label="loc_espTotalStockholdersEquityBeforyEsopAndTreasuryStock" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockValue" xlink:label="loc_espCommonStockValue" />
      <link:calculationArc order="100" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espTotalStockholdersEquityBeforyEsopAndTreasuryStock" xlink:to="loc_espCommonStockValue" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AdditionalPaidInCapitalCommonStock" xlink:label="loc_espAdditionalPaidInCapitalCommonStock" />
      <link:calculationArc order="200" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espTotalStockholdersEquityBeforyEsopAndTreasuryStock" xlink:to="loc_espAdditionalPaidInCapitalCommonStock" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_espRetainedEarningsAccumulatedDeficit" />
      <link:calculationArc order="300" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espTotalStockholdersEquityBeforyEsopAndTreasuryStock" xlink:to="loc_espRetainedEarningsAccumulatedDeficit" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_espAccumulatedOtherComprehensiveIncomeLossNetOfTax" />
      <link:calculationArc order="400" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espTotalStockholdersEquityBeforyEsopAndTreasuryStock" xlink:to="loc_espAccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_espStockholdersEquity" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_UnearnedESOPShares" xlink:label="loc_espUnearnedESOPShares" />
      <link:calculationArc order="100" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espStockholdersEquity" xlink:to="loc_espUnearnedESOPShares" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_TreasuryStockValue" xlink:label="loc_espTreasuryStockValue" />
      <link:calculationArc order="200" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espStockholdersEquity" xlink:to="loc_espTreasuryStockValue" xlink:type="arc" weight="-1" />
      <link:calculationArc order="300" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espStockholdersEquity" xlink:to="loc_espTotalStockholdersEquityBeforyEsopAndTreasuryStock" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_espLiabilitiesAndStockholdersEquity" />
      <link:calculationArc order="100" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espLiabilitiesAndStockholdersEquity" xlink:to="loc_espLiabilitiesNoncurrent" xlink:type="arc" weight="1" />
      <link:calculationArc order="200" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espLiabilitiesAndStockholdersEquity" xlink:to="loc_espStockholdersEquity" xlink:type="arc" weight="1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/BalanceSheetsParenthetical" xlink:title="0003 - Statement - Balance Sheets (Parenthetical)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/StatementsOfIncome" xlink:title="0004 - Statement - Statements of Income">
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_GrossProfit" xlink:label="loc_espGrossProfit" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SalesRevenueGoodsNet" xlink:label="loc_espSalesRevenueGoodsNet" />
      <link:calculationArc order="100" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espGrossProfit" xlink:to="loc_espSalesRevenueGoodsNet" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CostOfGoodsSold" xlink:label="loc_espCostOfGoodsSold" />
      <link:calculationArc order="200" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espGrossProfit" xlink:to="loc_espCostOfGoodsSold" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_espOperatingIncomeLoss" />
      <link:calculationArc order="100" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espOperatingIncomeLoss" xlink:to="loc_espGrossProfit" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense" xlink:label="loc_espSellingGeneralAndAdministrativeExpense" />
      <link:calculationArc order="200" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espOperatingIncomeLoss" xlink:to="loc_espSellingGeneralAndAdministrativeExpense" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="loc_espNonoperatingIncomeExpense" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherNonoperatingIncome" xlink:label="loc_espOtherNonoperatingIncome" />
      <link:calculationArc order="100" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espNonoperatingIncomeExpense" xlink:to="loc_espOtherNonoperatingIncome" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InvestmentIncomeInterestAndDividend" xlink:label="loc_espInvestmentIncomeInterestAndDividend" />
      <link:calculationArc order="200" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espNonoperatingIncomeExpense" xlink:to="loc_espInvestmentIncomeInterestAndDividend" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="loc_espIncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" />
      <link:calculationArc order="100" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espIncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:to="loc_espOperatingIncomeLoss" xlink:type="arc" weight="1" />
      <link:calculationArc order="200" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espIncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:to="loc_espNonoperatingIncomeExpense" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_espNetIncomeLoss" />
      <link:calculationArc order="100" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espNetIncomeLoss" xlink:to="loc_espIncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_espIncomeTaxExpenseBenefit" />
      <link:calculationArc order="200" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espNetIncomeLoss" xlink:to="loc_espIncomeTaxExpenseBenefit" xlink:type="arc" weight="-1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/StatementsOfChangesInStockholdersEquity" xlink:title="0005 - Statement - Statements of Changes in Stockholders' Equity" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/StatementsOfCashFlows" xlink:title="0006 - Statement - Statements of Cash Flows">
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_espNetCashProvidedByUsedInInvestingActivities" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_espPaymentsToAcquirePropertyPlantAndEquipment" />
      <link:calculationArc order="100" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espNetCashProvidedByUsedInInvestingActivities" xlink:to="loc_espPaymentsToAcquirePropertyPlantAndEquipment" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromCollectionOfLoansReceivable" xlink:label="loc_espProceedsFromCollectionOfLoansReceivable" />
      <link:calculationArc order="200" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espNetCashProvidedByUsedInInvestingActivities" xlink:to="loc_espProceedsFromCollectionOfLoansReceivable" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsToAcquireShortTermInvestments" xlink:label="loc_espPaymentsToAcquireShortTermInvestments" />
      <link:calculationArc order="300" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espNetCashProvidedByUsedInInvestingActivities" xlink:to="loc_espPaymentsToAcquireShortTermInvestments" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromSaleMaturityAndCollectionOfShorttermInvestments" xlink:label="loc_espProceedsFromSaleMaturityAndCollectionOfShorttermInvestments" />
      <link:calculationArc order="400" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espNetCashProvidedByUsedInInvestingActivities" xlink:to="loc_espProceedsFromSaleMaturityAndCollectionOfShorttermInvestments" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsToAcquireLoansReceivable" xlink:label="loc_espPaymentsToAcquireLoansReceivable" />
      <link:calculationArc order="500" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espNetCashProvidedByUsedInInvestingActivities" xlink:to="loc_espPaymentsToAcquireLoansReceivable" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromSalesOfAssetsInvestingActivities" xlink:label="loc_espProceedsFromSalesOfAssetsInvestingActivities" />
      <link:calculationArc order="600" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espNetCashProvidedByUsedInInvestingActivities" xlink:to="loc_espProceedsFromSalesOfAssetsInvestingActivities" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_espNetCashProvidedByUsedInFinancingActivities" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromSaleOfTreasuryStock" xlink:label="loc_espProceedsFromSaleOfTreasuryStock" />
      <link:calculationArc order="100" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_espProceedsFromSaleOfTreasuryStock" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsOfDividendsCommonStock" xlink:label="loc_espPaymentsOfDividendsCommonStock" />
      <link:calculationArc order="200" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_espPaymentsOfDividendsCommonStock" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromStockOptionsExercised" xlink:label="loc_espProceedsFromStockOptionsExercised" />
      <link:calculationArc order="300" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_espProceedsFromStockOptionsExercised" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities" xlink:label="loc_espExcessTaxBenefitFromShareBasedCompensationFinancingActivities" />
      <link:calculationArc order="400" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_espExcessTaxBenefitFromShareBasedCompensationFinancingActivities" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsForRepurchaseOfOtherEquity" xlink:label="loc_espPaymentsForRepurchaseOfOtherEquity" />
      <link:calculationArc order="500" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_espPaymentsForRepurchaseOfOtherEquity" xlink:type="arc" weight="-1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/NatureOfOperations" xlink:title="0007 - Disclosure - Nature of operations" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/SummaryOfSignificantAccountingPolicies" xlink:title="0008 - Disclosure - Summary of Significant Accounting Policies" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/InvestmentInFairValue" xlink:title="0009 - Disclosure - Investment in Fair Value" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/ContractsInProcess" xlink:title="0010 - Disclosure - Contracts in Process" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/PropertyPlantAndEquipment" xlink:title="0011 - Disclosure - Property, Plant and Equipment" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/PensionExpense" xlink:title="0012 - Disclosure - Pension Expense" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/ProvisionForIncomeTaxes" xlink:title="0013 - Disclosure - Provision for Income Taxes" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/SignificantCustomers" xlink:title="0014 - Disclosure - Significant Customers" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/StockRightsPlan" xlink:title="0015 - Disclosure - Stock Rights Plan" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/EmployeeStockOwnershipPlan" xlink:title="0016 - Disclosure - Employee Stock Ownership Plan" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/Stock-BasedCompensation" xlink:title="0017 - Disclosure - Stock-based Compensation" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/FinancialInstrumentsconcentrationOfCreditRisk" xlink:title="0018 - Disclosure - Financial Instruments/Concentration of Credit Risk" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/RelatedParties" xlink:title="0019 - Disclosure - Related Parties" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/CommitmentsAndContingencies" xlink:title="0020 - Disclosure - Commitments and Contingencies" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/StockholdersEquity" xlink:title="0021 - Disclosure - Stockholders' Equity" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/QuarterlyFinancialInformation" xlink:title="0022 - Disclosure - Quarterly Financial Information (Unaudited)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/SummaryOfSignificantAccountingPoliciesPolicies" xlink:title="0023 - Disclosure - Summary of Significant Accounting Policies (Policies)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/SummaryOfSignificantAccountingPoliciesTables" xlink:title="0024 - Disclosure - Summary of Significant Accounting Policies (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/InvestmentInFairValueTables" xlink:title="0025 - Disclosure - Investment in Fair Value (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/ContractsInProcessTables" xlink:title="0026 - Disclosure - Contracts in Process (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/PropertyPlantAndEquipmentTables" xlink:title="0027 - Disclosure - Property, Plant and Equipment (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/ProvisionForIncomeTaxesTables" xlink:title="0028 - Disclosure - Provision for Income Taxes (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/EmployeeStockOwnershipPlanTables" xlink:title="0029 - Disclosure - Employee Stock Ownership Plan (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/Stock-BasedCompensationTables" xlink:title="0030 - Disclosure - Stock-based Compensation (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/StockholdersEquityTables" xlink:title="0031 - Disclosure - Stockholders' Equity (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/QuarterlyFinancialInformationTables" xlink:title="0032 - Disclosure - Quarterly Financial Information (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/SummaryOfSignificantAccountingPoliciesDetails" xlink:title="0033 - Disclosure - Summary of Significant Accounting Policies (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/InvestmentInFairValueDetails" xlink:title="0034 - Disclosure - Investment in Fair Value (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/InvestmentInFairValueDetails1" xlink:title="0035 - Disclosure - Investment in Fair Value (Details1)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/InvestmentInFairValueDetailsNarrative" xlink:title="0036 - Disclosure - Investment in Fair Value (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/ContractsInProcessDetails" xlink:title="0037 - Disclosure - Contracts in Process (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/ContractsInProcessDetailsNarrative" xlink:title="0038 - Disclosure - Contracts in Process (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/PropertyPlantAndEquipmentDetails" xlink:title="0039 - Disclosure - Property, Plant and Equipment (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/PensionExpenseDetailsNarrative" xlink:title="0040 - Disclosure - Pension Expense (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/ProvisionForIncomeTaxesDetails" xlink:title="0041 - Disclosure - Provision for Income Taxes (Details)">
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_espIncomeTaxExpenseBenefit" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CurrentFederalTaxExpenseBenefit" xlink:label="loc_espCurrentFederalTaxExpenseBenefit" />
      <link:calculationArc order="100" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espIncomeTaxExpenseBenefit" xlink:to="loc_espCurrentFederalTaxExpenseBenefit" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CurrentStateAndLocalTaxExpenseBenefit" xlink:label="loc_espCurrentStateAndLocalTaxExpenseBenefit" />
      <link:calculationArc order="200" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espIncomeTaxExpenseBenefit" xlink:to="loc_espCurrentStateAndLocalTaxExpenseBenefit" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="loc_espDeferredIncomeTaxExpenseBenefit" />
      <link:calculationArc order="300" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espIncomeTaxExpenseBenefit" xlink:to="loc_espDeferredIncomeTaxExpenseBenefit" xlink:type="arc" weight="1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/ProvisionForIncomeTaxesDetails1" xlink:title="0042 - Disclosure - Provision for Income Taxes (Details1)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/ProvisionForIncomeTaxesDetails2" xlink:title="0043 - Disclosure - Provision for Income Taxes (Details2)">
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsGross" xlink:label="loc_espDeferredTaxAssetsGross" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities" xlink:label="loc_espDeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities" />
      <link:calculationArc order="100" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espDeferredTaxAssetsGross" xlink:to="loc_espDeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOther" xlink:label="loc_espDeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOther" />
      <link:calculationArc order="200" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espDeferredTaxAssetsGross" xlink:to="loc_espDeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOther" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost" xlink:label="loc_espDeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost" />
      <link:calculationArc order="300" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espDeferredTaxAssetsGross" xlink:to="loc_espDeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsInventory" xlink:label="loc_espDeferredTaxAssetsInventory" />
      <link:calculationArc order="400" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espDeferredTaxAssetsGross" xlink:to="loc_espDeferredTaxAssetsInventory" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsOther" xlink:label="loc_espDeferredTaxAssetsOther" />
      <link:calculationArc order="500" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espDeferredTaxAssetsGross" xlink:to="loc_espDeferredTaxAssetsOther" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredIncomeTaxLiabilities" xlink:label="loc_espDeferredIncomeTaxLiabilities" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxLiabilitiesUnrealizedGainsOnTradingSecurities" xlink:label="loc_espDeferredTaxLiabilitiesUnrealizedGainsOnTradingSecurities" />
      <link:calculationArc order="100" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espDeferredIncomeTaxLiabilities" xlink:to="loc_espDeferredTaxLiabilitiesUnrealizedGainsOnTradingSecurities" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment" xlink:label="loc_espDeferredTaxLiabilitiesPropertyPlantAndEquipment" />
      <link:calculationArc order="200" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espDeferredIncomeTaxLiabilities" xlink:to="loc_espDeferredTaxLiabilitiesPropertyPlantAndEquipment" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNet" xlink:label="loc_espDeferredTaxAssetsLiabilitiesNet" />
      <link:calculationArc order="100" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espDeferredTaxAssetsLiabilitiesNet" xlink:to="loc_espDeferredTaxAssetsGross" xlink:type="arc" weight="1" />
      <link:calculationArc order="200" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_espDeferredTaxAssetsLiabilitiesNet" xlink:to="loc_espDeferredIncomeTaxLiabilities" xlink:type="arc" weight="-1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/SignificantCustomersDetailsNarrative" xlink:title="0044 - Disclosure - Significant Customers (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/StockRightsPlanDetailsNarrative" xlink:title="0045 - Disclosure - Stock Rights Plan (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/EmployeeStockOwnershipPlanDetails" xlink:title="0046 - Disclosure - Employee Stock Ownership Plan (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/EmployeeStockOwnershipPlanDetailsNarrative" xlink:title="0047 - Disclosure - Employee Stock Ownership Plan (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/Stock-BasedCompensationDetails" xlink:title="0048 - Disclosure - Stock-based Compensation (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/Stock-BasedCompensationDetails1" xlink:title="0049 - Disclosure - Stock-based Compensation (Details1)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/Stock-BasedCompensationDetailsNarrative" xlink:title="0050 - Disclosure - Stock-based Compensation (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/FinancialInstrumentsconcentrationOfCreditRiskDetailsNarrative" xlink:title="0051 - Disclosure - Financial Instruments/Concentration of Credit Risk (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/StockholdersEquityDetails" xlink:title="0052 - Disclosure - Stockholders' Equity (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/StockholdersEquityDetails1" xlink:title="0053 - Disclosure - Stockholders' Equity (Details1)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://espry.com/role/QuarterlyFinancialInformationDetails" xlink:title="0054 - Disclosure - Quarterly Financial Information (Details)" />
</link:linkbase>
