[ 4 pts. ] An industrial engineer is considering two alternative robots to purchase by a fiber optic manufacturing company. If a 5 - years study period is considered, which one of the following value is closest to the future worth of incremental (Y-X) cash flows at an interest rate of 9% per year? Robot X Robot Y Investment cost now, S 75,000 105,000 Annual operating cost, $ 26,000 9,000 Salvage value at the end of study period, S 18,000 22,000 Select one: a. 74,476 b. 59,581 c. 53,623 d. 86,392 a O