Calculates an annuity investment's present value. This is done based on a constant interest rate and periodic payments of constant amounts.
PRESENT_VALUE(rate: Number, periods: Number, paymentamount: Number, futurevalue: Number, paymentsatthebeginningofperiod: Boolean) => Number
The interest rate
The number of payments to be made
The amount per period to be paid
Future value left when the final payment has been completed, defaults to 0.
Payments at the beginning of period
Whether payments are due at the end (false) or beginning (true) of each period