12. At an interest rate of 10% per year, the economic service life of an asset that has a current market value of $15,000 and the expected cash flows shown is (a) 1 year (b) 2 years (c) 3 years (d) 4 years (e) 5 years Operating Cost, $ -60,000 -60,000 -60,000 -60,000 -60,000 Salvage Value Year at End of Year, $ 10,000 10,000 8,000 6,000 4