Marwick’s pianos, inc., purchases pianos from a large manufacturer for an average cost of $1,500 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 cost formula selling: advertising $ 943 per month sales salaries and commissions $ 4,771 per month, plus 4% of sales delivery of pianos to customers $ 60 per piano sold utilities $ 659 per month depreciation of sales facilities $ 5,055 per month administrative: executive salaries $ 13,450 per month insurance $ 715 per month clerical $ 2,480 per month, plus $42 per piano sold depreciation of office equipment $ 916 per month during august, marwick’s pianos, inc., sold and delivered 58 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.