Presented below are selected transactions at Stellar Company for 2020. Jan. 1 June 30 Dec. 31 Retired a piece of machinery that was purchased on January 1, 2010. The machine cost 62,400 on that date. It had a useful life of 10 years with no residual value. Sold a computer that was purchased on January 1, 2017. The computer cost 37,800. It had a useful life of 5 years with no residual value. The computer was sold for 15,400. Discarded a delivery truck that was purchased on January 1, 2016. The truck cost 37,620. It was depreciated based on a 6-year useful life with a 3,000 residual value.