Traditional and Contribution Format Income Statements Marwick's Pianos, Inc., purchases pianos from a large manufacturer for an average cost of $2,450 per unit and then sells them to retail customers for an average price of $3,125 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 Cost Formula $700 per month $950 per month, plus 8% of sales $30 per piano sold $350 per month $800 per month Executive salaries Insurance Clerical Depreciation of office equipment $2,500 per month $400 per month $1,000 per month, plus $20 per piano solo $300 per month During August, Marwick's Pianos, Inc., sold and delivered 40 pianos Refer to the income statement you prepared in (2) above. Why might it be misleading to show the fixed costs on a per unit basis