Marwick's Pianos, Inc., purchases pianos from a large manufacturer for an average cost of $1,518 per unit and then sells them to retail customers for an average price of $2,100 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 $937 per month $4,828 per month, plus 5% of sales $60 per piano sold $634 per month $4,903 per month $13,423 per month $704 per month $2,484 per month, plus $36 per piano sold $899 per month During August, Marwick's Pianos, Inc., 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