EX 4-21 Adjustment data on an end-of-period spreadsheet Alert Security Services Co. offers security services to business clients. The trial balance for Alert Security Services has been prepared on the following end-of-period spreadsheet for the year ended October 31 , 20Y3: The data for year-end adjustments are as follows: a. Fees earned, but not yet billed, $13. b. Supplies on hand, $4. c. Insurance premiums expired, $10. d. Depreciation expense, $3. e. Wages accrued, but not paid, $1. Enter the adjustment data, and place the balances in the Adjusted Trial Balance columns. Answers are entered in the cells with gray backgrounds. Cells with non-gray backgrounds are protected and cannot be edited. An asterisk (*) will appear to the right of an incorrect entry. In the work sheet, enter a zero in cells you would otherwise leave blank