Standby power for pumps at water distribution booster stations can be provided by either gasolineor diesel-powered engines. The estimates for the gasoline engines are as follows: First cost, S M&O, $ per year Salvage value, $ Life,years Gasollne -150,000 -41,000 23,000 15 If the incremental PVV-based ROR equation associated with (Diesel-Gasoline) is 0 =-40,000 + 11,000(PAAi*, 15) + 16,000(PFA", 15), the first cost of the diesel engine is closest to: (a) -190,000 (b)-110,000 (c)-60,000 ( )-40,000