Marwick's Pianos, Incorporated, purchases pianos from a large manufacturer for an average cost of $1,483 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 $ 968 per month $ 4,801 per month, plus 6% of sales $58 per piano sold $ 639 per month $ 4,922 per month $ 13,487 per month. $ 719 per month $ 2,473 per month, plus $42 per piano sold $ 922 per month During August, Marwick's Pianos, Incorporated, sold and delivered 57 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.