1.the leontief company is evaluating the purchase of new computer for its marketing department replacing its existing computer the current computer

1.the leontief company is evaluating the purchase of new computer for its marketing department replacing its existing computer the current computer is fully depreciated and has little or no release value the new computer would cost 40,000 and would be depreciated fro tax purposes as five year asset using MACRS . the new computer would not enhance revenues , but would reduce expenses due to increased operating efficiency it is expected that the computer would be used for four years at which time it would have a resale value of 1000$?