The ledger of Hammond Company, on March 31, 2012, includes these selected accounts before adjusting entries are prepared.

Debit

Credit

Prepaid Insurance

$ 3,600

Supplies

2,800

Equipment

25,000

Accumulated Depreciation—Equipment

Unearned Service Revenue

9,200

An analysis of the accounts shows the following.

1. Insurance expires at the rate of $100 per month.

2. Supplies on hand total $800.

3. The equipment depreciates $200 a month.

4. One half of the unearned service revenue was earned in March.

Prepare the adjusting entries for the month of March.