Marwick's Pianos, Incorporated, purchases pianos from a large manufacturer for an average cost of $1,496 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 $969 per month $4,807 per month, plus 4% of sales $60 per piano soldi $655 per month $4,994 per month $13,444 per month $700 per month $2,490 per month, plus $42 per piano sold $867 per month During August, Marwick's Pianos, Incorporated, sold and delivered.30 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.