Marwick's Pianos, Inc., purchases pianos from a large manufacturer for an average cost of $1,510 per unit and then sells them to retail customers for an average price of $2,700 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 $967 per month $4,805 per month, plus 6% of sales $60 per piano sold $659 per month $5,059 per month $13,531 per month $686 per month $2,548 per month, plus $38 per piano sold $923 per month During August, Marwick's Pianos, Inc., sold and delivered 58 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