Answer:
Return on investment (ROI) for I = 18%
Return on investment (ROI) for II =26%
Return on investment (ROI) for III = 40%
Explanation:
Return on investment (ROI) = Controllable margin / Average operating assets
Return on investment (ROI) for I = $884,340 / $4,913,000 = 18%
Return on investment (ROI) for II = $2,065,180 / $7,943,000 = 26%
Return on investment (ROI) for III = $4,850,800 / $12,127,000 = 40%