Eastbay Hospital has an auxiliary generator that is used when power failures occur. The generator is worn out and must be either overhauled or replaced with a new generator. The hospital has assembled the following information: Present Generator New Generator Purchase cost new $ 15,500 $ 19,000 Remaining book value $ 8,500 - Overhaul needed now $ 7,500 - Annual cash operating costs $ 15,500 $ 9,000 Salvage value-now $ 3,500 - Salvage value-nine years from now $ 2,500 $ 5,000 If the company keeps and overhauls its present generator, then the generator will be usable for nine more years. If a new generator is purchased, it will be used for nine years, after which it will be replaced. The new generator would be diesel-powered, resulting in a substantial reduction in annual operating costs, as shown above. The hospital computes depreciation on a straight-line basis. All equipment purchases are evaluated using a 16% discount rate. (Ignore income taxes.) Determine the net present value of both using the total-cost approach. Please show equations and work. The excel formula for NPV does not help me