Marwick's Pianos, Inc., purchases planos from a large manufacturer for an average cost of $1,490 per unit and then sells them to retail customers for an average price of $3,400 each. The company's selling and administrative costs for a typical month are presented below. Costs Selling: Advertising Sales salaries and commissions Delivery of pianos to customers Utilities Depreciation of sales facilities Administrative: Executive salaries Insurance Cost Formula $941 per month $4,827 per month, plus 4% of sales $61 per piano sold $653 per month $5,097 per month $13,468 per month $692 per month Clerical Depreciation of office equipment $2,528 per month, plus $37 per piano sold $889 per month During August, Marwick's Pianos, Inc., sold and delivered 55 planos. 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.