Marwick's Pianos, Incorporated, purchases pianos from a large manufacturer for an average cost of $1,490 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: 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 $ 943 per month $ 4,823 per month, plus 5% of sales. $60 per piano sold $ 641 per month. $ 4,957 per month $ 13,494 per month $ 689 per month $ 2,538 per month, plus $41 per piano sold $ 891 per month During August, Marwick's Pianos, Incorporated, sold and delivered 60 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.