The ledger of Sheridan Company on March 31 of the current year includes the selected accounts below before adjusting entries have been prepared. Credit Debit $9,000 10,800 75,000 Supplies Prepaid Insurance Equipment Accumulated Depreciation-Equipment Notes Payable Unearned Rent Revenue Rent Revenue Interest Expense Salaries and Wages Expense $25,200 60,000 37,200 180,000 0 42,000 An analysis of the accounts shows the following. 1. 2. 3. The equipment depreciates $840 per month. Half of the unearned rent revenue was earned during the quarter. Interest of $1,200 is accrued on the notes payable. Supplies on hand total $2,550. Insurance expires at the rate of $1,200 per month. 4. 5. Prepare the adjusting entries at March 31, assuming that adjusting entries are made quarterly. (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 entered. Do not indent manually.)