Return on Investment The operating income and the amount of invested assets in each division of Otte Industries are as follows: Operating Income Invested Assets Retail Division $8,000,000 $40,000,000 Commercial Division 12,750,000 75,000,000 Internet Division 270,000 1,800,000 a. Compute the return on investment for each division. Division Percent Retail Division: Commercial Division: Internet Division: b. Which division is the most profitable per dollar invested