Marwick's Pianos, Incorporated, purchases pianos from a manufacturer for an average cost of $1,508 per unit and then sells them to retail customers for an average price of $3,100 each. The company's selling and administrative costs for a typical month are presented below: Costs Selling: Advertising Sales salaries and commissions Delivery of pianos to customers Utilities Depreciation of sales facilities Administrative: Executive salaries Insurance Clerical Cost Formula $937 per month $4,819 per month, plus 3% of sales $62 per piano sold $638 per month $5,010 per month $13,471 per month $682 per month $2,465 per month, plus $36 per piano sold Depreciation of office equipment $944 per month During August, Marwick's Pianos, Incorporated, sold and delivered 58 pianos. Required: 1. Prepare a traditional format income statement for August. 2. Prepare a contribution format income statement for August. Show costs and revenues on both a total and a per-unit basis down through contribution margin.