Marwicks Pianos, Inc., purchases pianos from a large manufacturer for an average cost of $1,493 per unit and then sells them to retail customers for an average price of $3,500 each. The companys selling and administrative costs for a typical month are presented below: Costs Cost Formula Selling: Advertising $ 958 per month Sales salaries and commissions $ 4,817 per month, plus 5% of sales Delivery of pianos to customers $ 60 per piano sold Utilities $ 669 per month Depreciation of sales facilities $ 4,928 per month Administrative: Executive salaries $ 13,460 per month Insurance $ 708 per month Clerical $ 2,537 per month, plus $42 per piano sold Depreciation of office equipment $ 949 per month During August, Marwicks 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