Jan.	1		Retired a piece of machinery that was purchased on January 1, 2007. The machine cost $62,900 on that date. It had a useful life of 10 years with no salvage value.
June	30		Sold a computer that was purchased on January 1, 2014. The computer cost $43,200. It had a useful life of 5 years with no salvage value. The computer was sold for $15,100.
Dec.	31		Discarded a delivery truck that was purchased on January 1, 2013. The truck cost $36,600. It was depreciated based on a 6-year useful life with a $3,000 salvage value.

Journalize all entries required on the above dates, including entries to update depreciation, where applicable, on assets disposed of. Ridge Company uses straight-line depreciation. (Assume depreciation is up to date as of December 31, 2016.)