Return on investment The operating income and the amount of invested assets in each division of Stewart Industries are as follows: a. Compute the return on investment for each division. (Round to the nearest whole percentage.) b. Which division is the most profitable per dollar invested? The operating income and the amount of invested assets in each division of Stewart Industries are as follows: Assume that management has established a 8% minimum acceptable return for invested assets. a. Determine the residual income for each division. b. Which division has the most residual income