Answer: the full gallon
Step-by-step explanation:
Half gallon = $2.20
full gallon = $3.68
since a half gallon is $2.20, when you buy 2 (to make a full gallon), it costs $4.40
since just buying a full gallon only costs $3.68, it is a better buy*
* if you don’t want a full gallon, however, you would just buy a half gallon. But, I don’t believe that this question is about whether you want a half or full gallon. It’s math.
