The ledger of Perez Rental Agency on March 31 of the current year includes the selected accounts, shown below, before quarterly adjusting entries have been prepared. Debit Credit
Prepaid Insurance $3,600
Supplies 2,800
Equipment 25,000
Accumulated
Depreciation—Equipment $84,000
Notes Payable 20,000
Unearned Rent Revenue 10,200
Rent Revenue 60,000
Interest Expense 0
Salaries and Wages 14,000

An analysis of the accounts shows the following.
1. The equipment depreciates $400 per month.
2. One-third of the unearned rent revenue was earned during the quarter.
3. Interest totaling $500 is accrued on the notes payable for the quarter.
4. Supplies on hand total $900.
5. Insurance expires at the rate of $200 per month.

Required:
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.