Question 1 (20 points) At i = 10% per year, a machine has a first cost of $10,000 and estimated operating costs and year-end salvage values as shown The annual equivalent cost if you operate the machine for 3 years is closest to which value? Year Operating Cost, $ Salvage Value, $ 1 21200 7000 5000 4200 3000 2000 1000 3 1500 2000 5 3000 4 -$1500 -$-3970 -$-4252 - $-4252