Jan. 1 Retired a piece of machinery that was purchased on January 1, 2012. The machi June 30 Sold a computer that was purchased on January 1,2020 . The computer cost $43 Dec. 31 Sold a delivery truck for $10,000 cash. The truck cost $34,150 when it was purc chine cost $64,400 and had a useful life of 10 years with no salvage value. $43,800 and had a useful life of 3 years with no salvage value. The computer was sold for $5,300 urchased on January 1, 2019, and was depreciated based on a 5-year useful life with a $3,000 sa