In 2015, Pennington Corporation had net sales of $603, 600 and cost of goods sold of $358, 300. Operating expenses were $148, 500, and interest expense was $7, 400. The corporation's tax rate is 31%. The corporation declared preferred dividends of $10, 700 in 2015, and its average common stockholders' equity during the year was $154, 200. Prepare an income statement for Pennington Corporation. Compute Pennington Corporation's return on common stockholders' equity for 2015. (Round answer to 1 decimal place, e.g. 10.5%.)