a. An analysis of WTI's insurance policies shows that $3,864 of coverage has expired. b. An inventory count shows that teaching supplies costing $3,349 are available at year-end. c. Annual depreciation on the equipment is $15,458. d. Annual depreciation on the professional library is $7,729. e. On September 1, WTI agreed to do five training courses for a client for $2,400 each. Two courses will start immediately and finish before the end of the year. Three courses will not begin until next year. The client paid $12,000 cash in advance for all five training courses on September 1, and WTI credited Unearned Revenue. f. On October 15, WTI agreed to teach a four-month class (beginning immediately) for an executive with payment due at the end of the class. At December 31, $13,000 of the tuition revenue has been earned by WTI. g. WTI's two employees are paid weekly. As of the end of the year, two days' salaries have accrued at the rate of $100 per day for each employee. h. The balance in the Prepaid Rent account represents rent for December. WELLS TECHNICAL INSTITUTE Unadjusted Trial Balance December 31 Cash Accounts receivable Teaching supplies Debit $27,849 Credit 10,710 Prepaid insurance 16,068 Prepaid rent 2,143 Professional library 32,133 Accumulated depreciation-Professional library $ 9,641 Equipment 103,000 Accumulated depreciation-Equipment 17,139 Accounts payable 23,000 Salaries payable 0 Unearned revenue 12,000 Teaching supplies expense Advertising expense. Utilities expense Totals Common stock Retained earnings Dividends Tuition revenue Training revenue Depreciation expense-Professional library Depreciation expense-Equipment Salaries expense Insurance expense Rent expense 32,496 79,000 42,845 109,254 40,702 51,415 23,573 7,498 5,998 $323,232 $323,232 Required: 1. Prepare the necessary adjusting journal entries for items a through h. Assume that adjusting entries are made only at year-end.