b'STAATSOLIE MAATSCHAPPIJ SURINAME N.V.NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS FOR THE YEAR ENDED DECEMBER 31, 2019 (Continued)4.5 GOODWILL AND OTHER INTANGIBLE ASSETS Other intangible assets(X US$ 1,000) E&P DataGoodwill ERPInformation Petromod Total Implementation ManagementSoftwaresystemCostAt1January2018 5,447 12,048 2,037-19,532Additions - - - - - Acquisitionofasubsidiary- - - - - At 31 December 20185,447 12,048 2,037 - 19,532 Additions -526- 243769At 31 December 20195,447 12,574 2,037 243 20,301 Amortization and impairmentAt1January2018-6,024 2,037-8,061Amortization-1,004- -1,004At 31 December 2018- 7,028 2,037 - 9,065 Amortization-1,065-28 1,093At 31 December 2019- 8,093 2,037 28 10,158 Net book value At31December2019 5,447 4,481-215 10,143At31December2018 5,447 5,020- -10,467Other intangible assetsfive-yearperiod.TheprojectedcashflowshavebeenupdatedtoreflectthedecreaseddemandforThebalanceatDecember31,2019ofother finishedoilproducts.intangibleassetsrepresentscapitalizedcomputersoftwarewithregardtoERPimplementationofSAP. Thepost-taxweightedaveragecostofcapital(WACC)discountrateappliedtothecashflowIn2019SAPwasalsoimplementedforGOw2 projectionsis12.10%(2018:12.48%),andcashwithadditionalcapitalizationofUS$526.SAP flowsbeyondthefive-yearperiodareextrapolatedsoftwareisamortizedonastraight-linebasis usinga2%(2018:2%)growthratethatistheoveraremainingusefullifeof4years(2018:5 sameasthelong-termaveragefuelconsumptionyears).PetromodSoftwarewaspurchasedforthe growthrateforthepetroleumproductssector.upstreamforUS$243andisbeingamortizedona Asaresultoftheanalysis,managementdidnotstraight-linebasisoverusefullifeof5years. identifyimpairmentforthisCGU.TheGOw2CGUImpairment testing of goodwillformspartofthedownstreamreportablesegment.Applyingapre-taxWACCdiscountrate17.71%TheGroupperformedtheannualimpairmenttest (2018:19.03%)tothecashflowprojectionsasatDecember31,2019. providesthesameVIUfortheCGU.Goodwillacquiredthroughbusinesscombinations Key assumptions used in value-in-use withindefinitelivehasbeenallocatedtooneCGU calculations (GOw2).Thecarryingvalue(netassetsincluding ThecalculationofVIUfortheGOw2CGUismostGoodwill)ofthisCGUisUS$49,682atDecember sensitivetothefollowingkeyassumptions:31,2019(US$44,041atDecember31,2018). Gross margin TherecoverableamountoftheGOw2CGUofUS$63,507atDecember31,2019(US$75,135 DiscountratesasatDecember31,2018)hasbeendeterminedbasedonavalue-in-use(VIU)calculationusingOil prices cashflowprojectionsfromfinancialbudgetsapprovedbyseniormanagementcoveringa Marketshareduringthebudgetperiod86 STAATSOLIE 2019 ANNUAL REPORT'