Exercise 13-18 Common-Size Income Statements and Horizontal Analysis LO2.3 Example 13-2, 13-5 Income statements for Mariners Corp. for the past two years are as follows: Sales revenue Cost of goods sold Gross profit Selling and administrative expense Operating income Interest expense Income before tax Income tax expense Net income (amounts in thousands of dollars) 2017 2016 $60,000 $50,000 42,000 30,000 $18,000 $20,000 9,000 5,000 $ 9,000 $15,000 2,000 2.000 $ 7,000 $13,000 2,000 4,000 $ 5,000 $ 9,000 Required 1. Using the format in Example 13-5, prepare common-size comparative income statements for the two years for Mariners Corp