Here are selected 2017 transactions of Pina Corporation Jan. 1 June 30 Retired a piece of machinery that was purchased on January 1, 2007. The machine cost $ 61,000 and had a useful life of 10 years with no salvage value. Sold a computer that was purchased on January 1, 2015. The computer cost $ 35,200 and had a useful life of 4 years with no salvage value. The computer was sold for $5,100 cash. Sold a delivery truck for $9.400 cash. The truck cost $ 23,300 when it was purchased on January 1, 2014, and was depreciated based on a 5-year useful life with a $3,800 salvage value. Dec. 31 ia