Marwick's Pianos, Inc., purchases pianos from a large manufacturer for an average cost of $1,504 per unit and then sells them to retail customers for an average price of $3,300 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 $951 per month $4,811 per month, plus 4% of sales $58 per piano sold $639 per month $4,916 per month $13,458 per month $703 per month $2,540 per month, plus $41 per piano sold $920 per month During August, Marwick's Pianos, Inc., sold and delivered 65 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