One Product Corporation (OPC) incorporated at the beginning of last year. The balances on its post-closing trial balance prepared on December 31, at the end of its first year of operations, were: Cash Accounts Receivable Allowance for Doubtful Accounts Inventory Prepaid Rent 20,730 8,260 985 12,420 1,800 Equipment 37,000 Accumulated Depreciation 3,600 Accounts Payable: 0 Sales Tax Payable 500 FICA Payable 600 Withheld Income Taxes Payable 500 Salaries and Wages Payable 1,600 Unemployment Tax Payable 300 Deferred Revenue. 4,500 Interest Payable 518 Notes Payable (long-term) 23,000 Common Stock 16,100 Additional Paid-In Capital, Common 19,687 Retained Earnings 12,320 Treasury Stock 4,000 The following information is relevant to the first month of operations in the following year: . OPC sells its inventory at $150 per unit, plus sales tax of 6 percent. OPC's January 1 inventory balance consists of 180 units at a total cost of $12,420. OPC's policy is to use the FIFO method, recorded using a perpetual inventory system. The $1,800 in Prepaid Rent relates to a payment made in December for January rent this year. The equipment was purchased on July 1 of last year. It has a residual value of $1,000 and an expected life of five years. It is being depreciated using the straight-line method. Employee wages are $4,000 per month. Employees are paid on the 16th for the first half of the month and on the first day of the following month for the second half of each month. Withholdings each pay period include $250 of income taxes and $150 of FICA taxes. These withholdings and the employer's matching contribution are paid monthly on the second day of the following month. In addition, unemployment taxes of $50 are accrued each pay period, and will be paid on March 31. Deferred Revenue is for 30 units ordered and paid for in advance by two customers in late December. One order of