For the year ended May 31, 2015, NIKE, Inc. financial statements included the following data: NIKE, Inc. Selected financial data Revenues 30,601 16,534 14,067 Cost of sales Gross profit Total selling and administrative expense Interest expense (net) Other income/expense (net) 9,892 28 (58) Net income 3,273 Use this data to calculate the profit margin ratio. 54.0% 10.7% 32.2% 100.0%