Assume Mitsubishi Chemical is evaluating a proposal to purchase a new compressor that would cost $200,000 and have a salvage value of $20,000 in five years. Mitsubishi's cost of capital is 16%. It would provide annual operating cash savings of S$22,500, as follows: Old Compressor New Compressor Salaries.. $60,000 12,000 23,000 35,000 $75,000 7,500 15,000 Supplies Utilities Cleaning and maintenance. 10,000 Total cash expenditures. $130,000 $107,500 If the new compressor is purchased, Mitsubishi will sell the old compressor for its current salvage value of $60,000. If the new compressor is not purchased, the old compressor will be disposed of in five years at a predicted scrap value of $6,000. The old compressor's present book value is $85,000. If kept, the old compressor will require repairs one year from now predicted to cost $75,000, Required a. Use the total cost approach to evaluate the alternatives of keeping the old compressor and purchas- ing the new compressor. Indicate which alternative is preferred. b. Use the differential cost approach to evaluate the desirability of purchasing the new compressor.