You have been provided the following information about Wert Inc. (in thousands of dollars) 2005 2006 Sales $2,456 $3,778 Net income 172 202 Interest expense 50 55 Total assets 1,800 1,950 Tax rate 35% 35% Return on assets for 2006 is: 13.71% 12.68% 10.77% 13.21%