Required information Exercise 20-17 (Algo) Change in estimate; useful life and residual value of equipment [LO20-4] [The following information applies to the questions displayed below.] Wardell Company purchased a mini computer on January 1,2019 , at a cost of $46,800. The computer has been depreciated using the straight-line method over an estimated five-year useful life with an estimated residual value of $4,800. On January 1,2021 , the estimate of useful life was changed to a total of 10 years, and the estimate of residual value was changed to $600. Exercise 20-17 (Algo) Part 2 2. Prepare the appropriate adjusting entry for depreciation in 2021 to reflect the revised estimate, assuming that the company uses the sum-of-the-years'-digits method instead of the straight-line method. (If no entry is required for a transaction/event, select "No journal entry required" in the first account field. Do not round intermediate calculations and round your final answers to nearest whole dollar.) Journal entry worksheet Note: Enter debits before credits