The ledger of Piper Rental Agency on March 31 of the current year includes the following selected accounts before adjusting entries have been prepared. Debit Credit Prepaid Insurance $ 3,600 Supplies 2,800 Equipment 25,000 Accumulated Depreciation—Equipment $ 8,400 Notes Payable 20,000 Unearned Rent 9,900 Rent Revenue 60,000 Interest Expense –0– Wages Expense 14,000 An analysis of the accounts shows the following. 1. The equipment depreciates $400 per month. 2. One-third of the unearned rent was earned during the quarter. 3. Interest of $500 is accrued on the notes payable. 4. Supplies on hand total $700. 5. Insurance expires at the rate of $200 per month. Instructions Prepare the adjusting entries at March 31, assuming that adjusting entries are made quarterly. Additional accounts are: Depreciation Expense, Insurance Expense, Interest Payable, and Supplies Expense.