The following information was available for the year ended December 31, 2013: Sales $ 520,000 Dividends per share $ 1.36 Net income 74,480 Earnings per share 3.00 Average total assets 820,000 Market price per share at year-end 28.50 Average total stockholders’ equity 380,000 Required: a. Calculate margin, turnover, and ROI for the year ended December 31, 2013. (Do not round intermediate calculations and ro