Required information The Foundational 15 (Algo) (LO11-1, LO11-2] [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 Average operating assets $ 1,500,000 530,000 970,000 670,000 $ 300,000 $ 937,500 At the beginning of this year, the company has a $212,500 investment opportunity with the following cost and revenue characteristics: Sales Contribution margin ratio Fixed expenses $ 340,000 70 % of sales $ 187,000 The company's minimum required rate of return is 10%. Foundational 11-1 (Algo) Required: 1. What is last year's margin? Margin % Foundational 11-2 (Algo) 2. What is last year's turnover? (Round your answer to 1 decimal place.) Turnover Foundational 11-3 (Algo) 3. What is last year's return on investment (ROI)? ROI % Foundational 11-4 (Algo) 4. What is the margin related to this year's investment opportunity? Margin