Bonita inc. reported net income of $239000 during 2020 and paid dividends of $27000 on common stock . It also has 10000 shares of 5%, $100 par value preerred stock outstanding. Common stockholders equity was $1180000 on January 1 2020, and $1520000 on December 31 2020. The company return on common stockholders equity for 2020 is