marwick piano incorporated purchases from a large manufacturer for an average cost 1517 and sells them to retail customers for an average price of 2800 each the company selling and administrative costs for a typical month are presented below cost cost formula selling: Advertising 946 per month sales salaries and commission 4774 per month delivery of piano to customers 59 per piano sold utilities 669 per month depreciation of sales facilities 5026 Administrative: executive salaries 13580 insurance 710 clerical 2479 per month plus 43 per piano sold depreciation of office equipment 942 per month during August marwick piano incorporated sold and delivered 64 piano s prepare a traditional income statement for August 2.prepare a contribution format income statement for August