Marwick's Pianos, Incorporated, purchases pianos from a large manufacturer for an average cost of $1,519 per unit and then sells them to retail customers for an average price of $2,900 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 $931 per month $4,774 per month, plus 5% of sales $59 per piano sold $661 per month $4,949 per month $13,415 per month. $702 per month $2,544 per month, plus $44 per piano sold $912 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.