The principal of the time value of money is probably the single most important concept in financial management. One of the most frequently encountered applications involves the calculation of a future value. The process for converting present values into future values is called four tirea-value-of-money variables. Which of the following is not one of these variables? This process requires knowledge of the values of three of The interest rate (1) that could be earned by invested funds The present value (PV) of the amount invested N The inflation rate indicating the change in average prices The duration of the investment (N)