Required information [The following information applles to the questions displayed below] Wardell Company purchased a mini computer on January 1, 2019, at a cost of $40,000. The computer has been depreciated using the straight-line method over an estimated five-year useful life with an estimated residual value of $4,000. On January 1, 2021, the estimate of useful uffe was changed to a total of 10 years, and the estimate of residual value was changed to $900. Required: 1. Prepare the appropriate adjusting entry for depreciation in 2021 to reflect the revised estimate. (If no entry is required for a transaction/event, solect "No journal entry required" in the first account field. Round your final answers to nearest whole dollar.)