Check my work [The following information applies to the questions displayed below.] Westerville Company reported the following results from last year's operations: Part 3 of 15 Sales Variable expenses contribution margin Pixed expenses Net operating income 1,500,000 530,000 970,000 670,000 $300,000 0.66 points Average operating asset s937,500 03:17:59 At the beginning of this year, the company has a $212,500 investment opportunity with the following cost and revenue characteristics: eBook Print References Sales Contribution margin ratio Pixed expenses 340,000 70% of sales 187,000 The company's minimum required rate of return is 10%. 3. What is last year's return on investment (ROI)? ROI