Check Required information [The following information applies to the questions displayed below.) Westerville Company reported the following results from last year's operations: of 15 Sales Variable expenses Contribution margin Fixed expenses Net operating income Average operating assets $1,500,000 730,000 770,000 470,000 $ 300,000 $ 937,500 Print At the beginning of this year, the company has a $362,500 investment opportunity with the following cost and revenue characteristics: Sales Contribution margin ratio Fixed expenses $ 580,000 70% of sales $ 319,000 The company's minimum required rate of return is 10% Required: 1. What is last year's margin? Margin % 2. What is last year's turnover? (Round your answer to 1 decimal place.) Turnover 3. What is last year's return on investment (ROI)? (Round your intermediate calculations to 1 decim ROI % 4. What is the margin related to this year's investment opportunity? Margin %