4. Management is considering the following independent courses of action in 2019 in order to maximize the return on investment for this division. (Based on original financial information above) Compute the controllable margin and the expected ROl for each proposed alternative. a) Reduce average operating assets by $125,000 with no change in controllable margin. b) Increase sales by $100,000 with no change in the contribution margin percentage (contribution margin ratio) 4. Management is considering the following independent courses of action in 2019 in order to maximize the return on investment for this division. (Based on original financial information above) Compute the controllable margin and the expected ROl for each proposed alternative. a) Reduce average operating assets by $125,000 with no change in controllable margin. b) Increase sales by $100,000 with no change in the contribution margin percentage (contribution margin ratio)