plz explain who is doing a better job

Question Completion Status: Selected info for two divisions of Irvin Brewing Company are given below. Sales Average operating assets Net operating income Property, plant, and equipment (net) East Division $1,000,000 $ 500,000 $ 180,000 5 425,000 West Division $ 3,500,000 $ 1,000,000 $ 225.000 $ 375,000 Compute the rate of return for each division. Which divisional manager seems to be doing the better job and why