Marwick's Pianos, Incorporated, purchases pianos from a manufacturer for an average cost of $1,514 per unit and then sells them to retail customers for an average price of $2,400 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 Clerical Depreciation of office equipment Cost Formula $932 per month $4,782 per month, plus 5% of sales $58 per piano sold $667 per month $5,051 per month $13,447 per month $683 per month $2,454 per month, plus $36 per piano sold $948 per month During August, Marwick's Pianos, Incorporated, sold and delivered 65 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.