Return on investment The operating income and the amount of invested assets in each division of Conley Industries are as follows: Retail Division Commercial Division Internet Division Operating Income $174,300 142,200 161,200 Invested Assets $830,000 790,000 620,000 a. Compute the return on investment for each division. (Round to the nearest whole percentage.) Division Retail Division Commercial Division Internet Division Percent % % % b. Which division is the most profitable per dollar invested?