Marwicks Pianos, Inc., purchases pianos from a large manufacturer for an average cost of $1,511 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 $ 957 per month Sales salaries and commissions $ 4,801 per month, plus 3% of sales Delivery of pianos to customers $ 60 per piano sold Utilities $ 633 per month Depreciation of sales facilities $ 4,924 per month Administrative: Executive salaries $ 13,566 per month Insurance $ 686 per month Clerical $ 2,488 per month, plus $40 per piano sold Depreciation of office equipment $ 859 per month During August, Marwicks Pianos, Inc., sold and delivered 57 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.