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# Accounting

#### Npv

Return the net present value of an investment.
 double npv (double rate, double value[], int nV)

#### Pv

Return the present value of an investment.
 double pv (double rate, int n, double p, double vn, PaymentPoint when=pp_EndOfPeriod)

#### Xnpv

Calculate net present value for a series of non-periodic cash flows. Excel: XNPV
 double xnpv (double rate, double values[], int dates[], int nV)

#### Deprec Pro Rated M

Return the depreciation for each accounting period. Excel: AMORDEGRC
 double deprecProRatedM (double valCost, int datePu, int dateFi, double valSalv, int per, double rate, Finance::Banking::YearBasis basis)

#### Depreciation

Return the depreciation for a specified period using the fixed-declining balance method. Excel: DDB
 double depreciation (double valCost, double valSalv, int life, int per, double fact=2.0)

#### Deprec Pro Rated

Return the depreciation for each accounting period. Excel: AMORLINC
 double deprecProRated (double valCost, int datePu, int dateFi, double valSalv, int period, double rate, Finance::Banking::YearBasis basis)

#### Deprec Straight

Finance namespace
 double deprecStraight (double cost, double salvage, int life)

#### Deprec Sum Of Years

Calculate the sum-of-years depreciation of an asset. Excel: SYD
 double deprecSumOfYears (double cost, double salvage, int life, int per)