7-15• 360-day Date Mode CalculationsThe following describes how calculations are processed when 360 is specified for the DateMode item in the Setup screen.• If d1 and d2 are both the last day of February (day 28 in a normal year, day 29 in a leapyear), d2 is treated as day 30.• If d1 is the last day of February, d1 is treated as day 30.• If d2 is day 31 of a month and d1 is day 30 or day 31 of a month, d2 is treated as day 30.• If d1 is day 31 of a month, d1 is treated as day 30.9. DepreciationDepreciation lets you calculate the amount that a business expense can be offset by income(depreciated) over a given year.• This calculator supports the following four types of depreciation calculations.straight-line (SL), fixed-percent (FP), sum-of-the-years’-digits (SYD), or declining-balance(DB).• Any one of the above methods can be used to calculate depreciation for a specified period.A table and graph of the depreciated amount and undepreciated amount in year j.u Straight-Line Method (SL)SL j : depreciation charge for the jth yearn : useful lifePV : original cost (basis)FV : residual book valuej : year for calculation of depreciationcostY−1 : number of months in the first yearof depreciationu Fixed-Percent Method (FP)FP j : depreciation charge for the jth yearRDVj : remaining depreciable value at theend of jth yearI% : depreciation ratio{Y–1}(PV–FV )SL1 = n 12u(PV–FV )SLj = n12–{Y–1}({Y–1}≠12)(PV–FV )n 12uSL n+1 ={Y–1}(PV–FV )SL1 = n 12u(PV–FV )SLj = n12–{Y–1}({Y–1}≠12)(PV–FV )n 12uSL n+1 =100I%FP j = (RDVj–1 + FV ) ×100{Y–1}I%FP1 = PV × 12×FPn+1 = RDVn ({Y–1}≠12)RDV1 = PV – FV – FP1RDVj = RDVj–1 – FPjRDVn+1 = 0 ({Y–1}≠12)100I%FP j = (RDVj–1 + FV ) ×100{Y–1}I%FP1 = PV × 12×FPn+1 = RDVn ({Y–1}≠12)RDV1 = PV – FV – FP1RDVj = RDVj–1 – FPjRDVn+1 = 0 ({Y–1}≠12)
