Marwick's Pianos, Inc., purchases pianos from a large manufacturer for an average cost of $1,494 per unit and then sells them to retail customers for an average price of $2,800 each. The company's selling and administrative costs for a typical month are presented below: Cost Formula Costs Selling: Advertising Sales salaries and commissions Delivery of pianos to customers Utilities Depreciation of sales facilities $967 per month $4,784 per month, plus 4% of sales $61 per piano sold $654 per month $5,059 per month Administrative: Executive salaries Insurance Clerical Depreciation of office equipment $13,544 per month $707 per month $2,515 per month, plus $44 per piano sold $940 per month During August, Marwick's Pianos, Inc., sold and delivered 57 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