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Exercise 11-22 Change in estimate; useful life and residual value of equipment [L011-2, 11-5 of equipment Lo1-2,1-5) Wardell Company purchased a minicomputer on January 1, 2016, at a cost of $57000. The computer was depreciated using the straight-line method over an estimated five-year life with an estimated residual value of $6,000. On January 1, 2018, the estimate of useful life was changed to a total of 10 years, and the estimate of residual value was changed to $1,200. Required: 1. Prepare the year-end journal entry for depreciation in 2018. No depreciation was recorded during the year 2. Prepare the year-end journal entry for depreciation in 2018. Assume that the company uses the sum-of-the-years' -digits method instead of the straight-line method