Marwick's Pianos, Inc., purchases pianos from a large manufacturer for an average cost of $1,488 per unit and then sells them to retai customers for an average price of $3,300 each. The company's selling and administrative costs for a typical month are presented below Costs Selling: ormula Advertising Sales salaries and commissions Delivery of pianos to customers Utilities Depreciation of sales facilities $947 per month $4,790 per month, plus 4% of sales $60 per piano sold $635 per month $5,019 per month Administrative: Executive salaries Insurance Clerical Depreciation of office equipment $13,481 per month $698 per month $%2,456 per month, plus $44 per piano sold $880 per month During August, Marwick's Pianos, Inc., sold and delivered 56 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