The largest amount of juice that each container can hold of each kind of juice is 6galons
becouse:

and:

both of this numbers can be devided by 6 and this is the highest common divisor
They need to sell 200 bumper stickers.
Explanation: 1.50 x B = 300
1.5 as a percent is 150%
Hope this helps!
I would say it's the one you have checked off on the paper.