Answer: 72%
Step-by-step explanation:
ROI = Net Income/ Average Assets
Assuming Contribution Margin increases by $30,000;
= 240,000 + 30,000
= $270,000
Net income = Contribution margin - Fixed cost
= 270,000 - 90,000
= $180,000
ROI = 180,000 / 250,000
= 72%