Marwick's Pianos, Inc., 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 $2,300 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 $961 per month $4,811 per month, plus 4% of sales $61 per piano sold 5661 per month $4,924 per month $13,580 per month $703 per month $2,473 per month, plus $42 per piano sold $915 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