Calculate the profit margin ratio based on the following information: cash = $14,870; accounts receivable = $22,108; prepaid $3,010; supplies = $927; equipment = $62,150; accumulated depreciation = 13,750; accounts payable = 28,000; net sales = $325,000; interest expense $6,000; tax expense = $12,600; earnings before interest and taxes = $122,623; number of shares outstanding = 335,000. Round to two decimal places.