Gabbe Industries is a division of a major corporation. Last year the division had total sales of $31,098,000, net operating income of $4,509,210, and average operating assets of $8,760,000. The company's minimum required rate of return is 20%. Required: a. What is the division's margin? (Round your percentage answer to 2 decimal places.) b. What is the division's turnover? (Round your answer to 2 decimal places.) c. What is the division's return on investment (ROI)? (Round percentage your answer to 2 decimal places.) % a. Margin b. Turnover c. Return on investment %