A firm uses a MARR of 12%. A crane was purchased 4 years ago for $180,000 and it has a current market value of $60,000. Expected operating and maintenance costs and market values follow. Data for a new crane have been analyzed. Its most economic life is 8 years with a minimum EUAC of $38,000. When should the existing crane be replaced?
Year O&M costs Market value
1 17,000 50,000
2 20,000 42,000
3 25,000 35,000
4 30,000 30,000
5 35,000 24,000