Marwicks Pianos, Incorporated, purchases pianos from a large manufacturer for an average cost of $1,496 per unit and then sells them to retail customers for an average price of $2,400 each. The companys selling and administrative costs for a typical month are presented below: Costs Cost Formula Selling: Advertising $ 965 per month Sales salaries and commissions $ 4,806 per month, plus 4% of sales Delivery of pianos to customers $ 59 per piano sold Utilities $ 666 per month Depreciation of sales facilities $ 4,944 per month Administrative: Executive salaries $ 13,419 per month Insurance $ 720 per month Clerical $ 2,519 per month, plus $37 per piano sold Depreciation of office equipment $ 942 per month During August, Marwicks Pianos, Incorporated, sold and delivered 59 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.