Community Technical School's unadjusted trial balance on December 31, 1993, the end of its annual accounting period, is as follows: COMMUNITY TECHNICAL SCHOOL Trial Balance December 31, 1993 Cash. $ 7.200 Oflice supplies 4.300 Prepaid insurance 8.100 Professional library. 19,800 Accumulated amortization, professional library S 8.490 Equipment. 43,300 Accumulated amortization, equipment. 14.900 Accounts payable 860 Uncarned extension fees. 2.400 Kay Perry, capital 55.950 Kay Perry, withdrawals 15.000 Enrollment fees earned. 43,400 Salaries expense 16,800 Rent expense.. 9.600 Advertising expense 500 Utilities expense 1,400 Totals, $126.000 $126,000 Required 1. Set up accounts for the items in the trial balance plus these accounts: Accounts Receivable: Salaries Payable: Extension Fees Earned; Amortization Expense, Equipment: Amortization Expense. Professional Library; Insurance Expense; and Office Supplies Expense. Enter the trial balance amounts in the accounts. 2. Use the following information to prepare and post adjusting entries: 4. An examination of insurance policies shows $900 of expired insurance. b. An inventory shows $1,670 of office supplies on hand. c. Estimated annual amortization on the equipment is $3,300. d. Estimated annual amortization on the professional library is $1,320. e. Community Technical School offers extended services to those in need of training beyond the campus. On November 1, the company agreed to in- home tutoring for a client. The contract calls for a $600 monthly fee, and the client paid the first four months' fees in advance at the time the contract was signed. The amount paid was credited to Unearned Extension Fees. f. On October 15, the school agreed to teach a three-month computer class for a local business for $1,080 per month payable at the end of the class. Exten- sion fees for two and one half months have accrued