Do not use Excel or tables

Given the following data, use present worth analysis to find the best alternative, A, B, or C. 5-73 $10,000 15,000 $12,000 Initial cost Annual benefit 6,000 10,000 5,000 Salvage value 1,000 -2,000 3,000 Useful life 2 years 3 years 4 years Use an analysis period of 12 years and 15% interest