Marwick's Pianos, Inc., purchases pianos from a large manufacturer for an average cost of $1,519 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: 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 $942 per month $4,786 per month, plus 48 of sales $57 per piano sold $659 per month $4,948 per month $13,504 per month $686 per month $2,484 per month, plus $37 per piano sold $913 per month During August, Marwick's Planos, Inc., sold and delivered 62 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