The Foundational 15 (LO10-1, LO10-2] [The following information applies to the questions displayed below.] Westerville Company reported the following results from last year's operations: Sales Variable expenses Contribution margin Fixed expenses Net operating income $ 1,200,000 420,000 780,000 600,000 $ 180,000 Average operating assets $ 600,000 At the beginning of this year, the company has a $137,500 investment opportunity with the following cost and revenue characteristics: Sales Contribution margin ratio Fixed expenses $ 220,000 60% of sales $ 99,000 The company's minimum required rate of return is 20%. 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 decimal place.) ROI % 4. What is the margin related to this year's investment opportunity? Margin %