Use the data given for Drexel-Hall to answer the following questions. a. Assume that by spending an additional $15,000 per month in advertising a particular store, Drexel-Hall can increase the sales of that store by 10 percent. Which store should the company advertise to receive the maximum benefit from this additional advertising expenditure? Explain. b. From the viewpoint of top management, which is the most profitable of the three stores? Why? c. Which store manager seems to be pursuing the most effective strategy in managing his or her store? Why?