Return on investment The operating income and the amount of invested assets in each division of Conley Industries are as follows: Operating Income Invested Assets Retail Division $160,000 $800,000 Commercial Division 100,800 560,000 Internet Division 69,000 460,000 a. Compute the return on investment for each division. (Round to the nearest whole percentage.) Division Percent Retail Division Commercial Division Internet Division b. Which division is the most profitable per dollar invested