E14-13B In 2017, Markowitz Corporation had net sales of $600,000 and cost of goods sold of $390,000. Operating expenses were $143,000, and interest expense was $7,500. The corporation's tax rate is 30%. The corporation declared preferred dividends of $15,000 in 2017, and its average common stockholders' equity during the year was $200,000. Instructions (a) Prepare an income statement for Markowitz Corporation. (b) Compute Markowitz Corporation's return on common stockholders' equity for 2017