Marwick's Pianos, Incorporated, purchases pianos from a large manufacturer for an average cost of $1,487 per unit and then sells them to retail customers for an average price of $3,200 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 Depreciation of office equipment Cost Formula $ 949 per month $ 4,800 per month, plus 5% of sales $ 58 per piano sold $ 651 per month $ 5,030 per month $ 13,584 per month $ 704 per month $ 2,543 per month, plus $44 per piano sold $ 947 per month During August, Marwick's Pianos, Incorporated, 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