Colonial Pharmaceuticals is a small firm specializing in new products. It is organized into two divisions, which are based on the products they produce. AC Division is smaller and the life of the products it produces tend to be shorter than those produced by the larger SO Division. Selected financial data for the past year is shown as follows. Divisional investment is as of the beginning of the year. Colonial Pharmaceuticals uses a 8 percent cost of capital and uses beginning-of-the-year investment when computing ROI and residual income. Ignore income taxes. AC Division SO Division Allocated corp. overhead $ 655 $ 1,250 Cost of goods sold 3,310 5,900 Divisional investment 10,100 74,500 R&D 2,550 3,050 Sales 10,200 14,500 SG&A 865 980 Required: a. Compute divisional income for the two divisions. b. Calculate the operating margin, which is equivalent to the return on sales, for the two divisions. c. Calculate ROI for the two divisions. d. Compute residual income for the two divisions.