Help I Jan. 1 Retired a piece of machinery that was purchased on January 1, 2007. The machine cost $62,600 and had a useful life of 10 years with no salvage value. une Sold a computer that was purchased on January 1, 2015. The computer cost $36,400 and had a useful life of 4 years with no salvage value. The computer was $3,700 salvage value