Return on investment The operating income and the amount invested assets in each division of Conley Industries are as follows: Operating Income Invested Assets Retail Division $76,000 $380,000 Commercial Division 82,800 360,000 Internet Division 180.000 750,000 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