The contribution format income statement for Westex, Inc. for its most recent period is given below: Total Unit Sales $1,000,000 $50.00 Variable Exp. 600,000 30.00 Contribution Margin 400,000 20.00 Fixed Exp. 320,000 16.00 Net operating income 80,000 4.00 Income tax (40%) 32,000 1.60 Net income $48,000 $2.40 The company had average operating assets of $500,000 during the period. Compute the company's return on investment using the ROI formula using the ROI forumua state in terms of margins and turnover