Use the following financial statement information available for Jones Corporation 2012 2011 Net sales $784,000 $697,000 Cost of goods sold 406,000 377,000 Net income 112,000 80,000 Tax expense 48,000 29,000 Interest expense 14,000 14,000 (a) The net profit margin ratio for Jones Corporation for 2012 is: (b) The net profit margin ratio for Jones Corporation for 2011 is: (c) The gross profit margin ratio for Jones Corporation for 2012 is