40 ces Marwick's Pianos, Incorporated, purchases pianos from a large manufacturer for an average cost of $1,506 per unit and then sells them to retail customers for an average price of $2,100 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 Depreciation of office equipment Cost Formula $935 per month $4,791 per month, plus 5% of sales. $57 per piano sold $665 per month $4,963 per month $13,411 per month $713 per month $2,475 per month, plus $43 per piano sold $885 per month During August, Marwick's Pianos, Incorporated, sold and delivered 61 planos. 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