5-73 Given the following data, use present worth analysis to find the best alternative, A, B, or C. $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 4 years 3 years 2 years Use an analysis period of 12 years and 15% interest