Required information 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 $ 1,300,000 440,000 860,000 600,000 $ 260,000 Average operating assets $ 812,500 At the beginning of this year, the company has a $162,500 investment opportunity with the following cost and revenue characteristics: Sales Contribution margin ratio Fixed expenses $ 260,000 806 of sales $ 182,000 The company's minimum required rate of return is 15%. Foundational 10-1 Required: 1. What is last year's margin? Margin % Foundational 10-2 2. What is last year's turnover? (Round your answer to 1 decimal place.) Tumover Foundational 10-3 3. What is last year's return on investment (ROI)? (Round your intermediate calculations to 1 decimal place.) ROI % Foundational 10-4 4. What is the margin related to this year's investment opportunity? Margin %