Questions: Selected comparative statement data for Rawan Products Company. All balance sheet data are as of December 31. 2018 2017 Net sales $750,000 $730,000 Cost of goods sold 470,000 440,000 Interest expense 8,000 5,000 Net income 50,000 42,000 Accounts receivable 120,000 100,000 Inventory 85,000 75,000 Total assets 680,000 600,000 Total common stockholders' equity 430,000 325,000 Requirements: 1- Compute the following ratios for 2018. (a) Profit margin. (b) Asset turnover. (c) Return on assets. (d) Return on common stockholders' equity