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 $86,100 $410,000 Commercial Division 72,200 380,000 Internet Division 131,200 820,000 a. Compute the return on investment for each division. (Round to the nearest whole percentage.) Division Retail Division Percent % Commercial Division % Internet Division % b. Which division is the most profitable per dollar invested