value: 15.00 points Marwick's Pianos, Inc., purchases pianos from a large manufacturer and sells them at the retail level. The pianos cost, on the average, $1,506 each from the manufacturer. Marwick's Pianos, Inc., sells the pianos to its customers at an average price of $2,800 each. The selling and administrative costs that the company incurs in a typical month are presented below: Costs Cost Formula Selling: Advertising Sales salaries and commissions Delivery of pianos to customers Utilities Depreciation of sales facilities $935 per month $4,822 per month, plus 4% of sales $60 per piano sold $652 per month $5,037 per month Administrative: Executive salaries Insurance Clerical Depreciation of office equipment $13,411 per month $718 per month $2,519 per month, plus $44 per piano sold $921 per month During August, Marwick's Pianos, Inc., sold and delivered 61 pianos