7. Responsibility Accounting: a. What is a cost center? Give an example of a cost center b. What is a Profit center? Give an example of a profit center c. What is an investment center? Give an example of an investment center d. What is management by exception e. The Mega Division of Green Corporation is an investment center. It has $1,000,000 of operating assets. During 2018, the Mega Division earned operating income of $300,000 on S6,000,000 of sales. Green's companywide return on investment or desired rate of return is approximately 10% SHOW WORK FOR CREDIT 1. What is the ROI? 2. What is the margin? . What is the turnover? 4. What is the residual income