Bonita Company purchased a computer system for $79,300 on January 1, 2019. It was depreciated based on a 7-year life and an $19,800 salvage value. On January 1, 2021, Bonita revised these estimates to a total useful life of 4 years and a salvage value of $10,400. Bonita uses straight-line depreciation. Prepare Bonita's entry to record 2021 depreciation expense. (Credit account titles are automatically indented when amount is entered. Do not indent manually. If no entry is required, select "No Entry" for the account titles and enter O for the amounts.) Account Titles and Explanation Depreciation Expense Accumulated Depreciation-Equipment Debit Credit