Calculate the future value of a level annuity and the total interest earned over the payment period.
每期期末等额存入 PMT、共 N 期、每期利率 i 的年金终值。
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Future value of an annuity | FV = PMT·[((1+r)^n − 1) / r] for end-of-period payments | Standard time-value-of-money (Brealey & Myers) |