Marwick's Pianos, Inc., purchases pianos from a large manufacturer for an average cost of $1,482 per unit and then sells them to retail customers for an average price of $2,600 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 Administrative: Executive salaries Insurance clerical Depreciation of office equipment $964 per month $4,816 per month, plus 3% of sales $60 per piano sold $631 per month $5,025 per month $13,554 per month $692 per month $2,503 per month, plus $43 per piano sold $893 per month During August, Marwick's Pianos, Inc., sold and delivered 62 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