Compute six ratios that measure Mariner Corporation's ability to earn profits. The company's comparative income statement follows. The data for 2015 are given as needed. | (Click the icon to view the comparative income statement.) Did the company's operating performance improve or deteriorate during 2017? Income statement Mariner Corporation Income Statement For the Years Ended December 31, 2017 and 2016 (amounts in thousands) 2017 2016 Sales revenues $ 178,120 $ 167,725 Less: Cost of goods sold 94,000 88,000 Gross profit $ 84,120 $ 79,725 Less: Operating expenses 43,000 35,000 Operating income 41,120 $ 44,725 Less: Interest expense 7,360 8,100 Income before income taxes $ 33,760 $ 36,625 Less: Income tax expense 11,495 23,207 $ 22,265 $ 13,418 Net income 2015 Additional data: Total assets $ 203,000 $ 192,000 $ 179,000 Common stockholders' equity $ 110,050 $ 86,000 $ 77,000 -