Net present value of investment in Excel
To do it in Excel, here is the answer:
a) Enter the formula =PV(6%/12,36,500) in an empty cell.
Note: First argument is interest rate - 6% is annual interest rate. Hence it is divided by 12 to get monthly rate.
Note: Second argument is number of periods - (3 years = 36 months).
Note: Third argument is payment per period - ($500).
Above formula returns the Present Value of the investment being considered as shown below.