PROBLEM 4-1B The trial balance for Mason's Insurance Agency as of August 31, after the firm has completed its first month of operations, is shown on the next page. (Continued) Part 1: The Accounting Cycle for a Service Business: Analyzing Business Transactions Required 1. Record amounts in the Trial Balance columns of the work sheet. 2. Complete the work sheet by making the following adjustments and lettering each adjustment: a. Expired or used-up insurance, $260. b. Depreciation expense on office equipment, $900. c. Supplies used, $200