30. Prepare the adjusting entry for following items on December 31 of the current year.

1. The prepaid insurance account shows a debit of $6,000, representing the cost of a 2-year casualty insurance policy dated September 1 of the current year.

2. On November 1, Rent Revenue was credited for $2,400, representing revenue from a subrental for a 3-month period beginning on that date.

3. Purchase of advertising supplies for $800 during the year was recorded in the Advertising Expense account. On December 31, advertising supplies of $290 are on hand.

4. Interest of $770 has accrued on notes payable.