Calculates an investment's payment on interest. This is done based on a constant interest rate and periodic payments of constant amounts.
PPMT(rate: Number, period: Number, numberofperiods: Number, presentvalue: Number, futurevalue: Number, paymentsatthebeginningofperiod: Boolean) => Number
The interest rate
The amortization period, between 1 and Number of periods.
Number of periods
The number of payments to be made
The current value of the annuity.
The future value remaining after the final payment has been made (Default is 0).
Payments at the beginning of period
Whether payments are due at the end (false) or beginning (true) of each period