Selected comparative statement data for Willingham Products Company are presented below. All balance sheet data are as of December 31. Note: sorry the the numbers are disorganized. The 1st number in each row is 2012 and the 2nd number is 2011 2012 2011 Net sales $755,790 $715,150 Cost of goods sold 471,390 430,490 Interest expense 8,910 4,020 Net income 48,040 45,550 Accounts receivable 116,070 119,650 Inventory 88,060 79,460 Total assets 574,230 491,530 Total common stockholders' equity 433,420 331,950 Compute the following ratios for 2012. (Round answers to 1 decimal place, e.g. 10.5.) (a) Profit margin % (b) Asset turnover times (c) Return on assets % (d) Return on common stockholders' equity %