The process for converting present values into future values is called . this process requires knowledge of the values of three of four time-value-of-money variables. which of the following is not one of these variables?
(a) the interest rate (i) that could be earned by deposited funds
(b) the present value (pv) of the amount deposited
(c) the duration of the deposit (n)
(d) the trend between the present and future values of an investment
(e) all other things being equal, the numerical difference between a present and a future value corresponds to the amount of interest earned during the deposit or investment period.

T-comm makes a variety of products. it is organized in two divisions, north and south. the managers for each division are paid, in part, based on the financial performance of their divisions. the south division normally sells to outside customers but, on occasion, also sells to the north division. when it does, corporate policy states that the price must be cost plus 20 percent to ensure a "fair" return to the selling division. south received an order from north for 300 units. south's planned output for the year had been 1,200 units before north's order. south's capacity is 1,500 units per year. the costs for producing those 1,200 units follow