System.Math.FutureValue
Description
Calculates the future value of an investment.
FutureValue returns the future value of an investment of PresentValue where Payment is invested for NPeriods at the rate of Rate per period. The PaymentTime parameter indicates whether the investment is an ordinary annuity or an annuity due (enter ptEndOfPeriod if payments are at the end of each period, ptStartOfPeriod if they are at the beginning).