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 $81,400 $370,000 Commercial Division 192,500 770,000 Internet Division 135,200 520,000 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