Which of the following is a profit center? A. a profitable manufacturing company B. an unprofitable Best Buy store C. accounting department in a profitable hi-tech company D. all of the above E. A and B only Required rate of return is 12% a year Profit is $200. Sales revenue is $5,000. Investment (operating assets) is $2, 500. Compute the residual income (RI). A. ($400) B. ($100) C. $300 D. (4%) E. 8%