Current Attempt in Progress At the end of its first year, the trial balance of Sandhill Company shows Equipment $21,900 and zero balances in Accumulated Depreciation-Equipment and Depreciation Expense. Depreciation for the year is estimated to be $3,900. (a1) Your answer is correct. Prepare the annual adjusting entry for depreciation at December 31. (List debit entry before credit entry. If no entry is required, select "No Entry" for the account titles and enter O for the amounts. Credit account titles are automatically indented when the amount is entere Do not indent manually.) Date Account Titles and Explanation Debit Credit 3900 Dec. 31 Depreciation Expense Accumulated Depreciation-Equipment 3900 eTextbook and Media List of Accounts Sandhill Company Partial Balance Sheet