Answer:
The answer to this question would be 60
Explanation:
You would take 240, and divide it by 60 and you get 4, if you take 360 and divide it by 60, you get 6, and if you take the 540 and divide it by 60 as well, you get 9. Therefore, 60 is the highest number of gift bags that she can make.
Hope this helps! :)