I wonder how can I sovle this problem fast. if you know any fast way pleas show me. I know LCD of 2,3 and 4 is 12 for alternative A, I have $10,000 which keep repeat and I need to write 5 times P(P/F,i,n) for calculating present value of $10,000. this takes long time. any suggesiton for solving this question faster.in exam, I have access to table and calculator.

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