The R representing the annual straight-line percentage rate for a new tractor purchase is found by dividing 100 percent by... a. the length of the loan for the tractor b. the useful life. c. 250 d. 16 years 17. In whole farm planning it is assumed that when _____________________ is maximized, total profit is maximized a. profit per unit b. gross margin per unit c. total gross margin d. total gross income 18. The purpose of liquidity analysis is to estimate if: a. the supply of labor will be sufficient to carry out the plan b. the supply of irrigation water will be sufficient c. cash inflows will be sufficient to meet expected cash outflows d. net farm income will be positive or negative