Please answer and explain. I am taking the test now:

Gaal Industries is a division of a major corporation. Last year the division had total sales of $27,311,900, net operating income of $2,840,438, and average operating assets of $7,094,000. The company's minimum required rate of retum is 15% Required a. What is the division's margin? (Round your answer to 2 decimal places.) Division's Ma b. What is the division's turnover? (Round your answer to 2 decimal places.) c. What is the division's return on investment (ROl)? (Round your answer to 2 decimal places.) etum on