Ihave been stuck with this question can someone me on 10

Work:

A 12-pack of boxes is 4 3-pack of boxes, I found this by dividing 12 by 3. 

A 24-pack of boxes is 2 12-pack of boxes, found by dividing 24 by 12.

A 24-pack of boxes is 8 3-pack of boxes, found by dividing 24 by 3 or by multiplying the two previous together (sometimes may not work)
Multiply 
$1.09 × 4 

That gets you to $4.36, which is less than the price of a 12-pack of boxes.

Then, multiply
$4.39 × 2

That gets you $8.78, which is less than a 24-pack of boxes.

Finally, multiply
$1.09 × 8

That gets you $8.72, which is less than a 24-pack of boxes.

The best to buy is the 3-pack of boxes of juice, because it is cheaper when buying multiple of the 3-packs than it is to buy one or more of the 12-pack or 24-pack.

Hope this helps anyone with the question.

10.SHOPPING
 So what you want to do is divide the cost by the amount of juice boxes you're getting, so for the first one you want to divide 1.09/3 to get the cost for one box of juice, then for the second 4.39/12 and 8.79/24 to see which is the lowest price per box.1.09/3=0.36333333333 rounded to 0.364.39/12=0.36583333333 rounded to 0.37
8.79/24=0.36625 rounded to 0.37
The answer is the pack of 3 boxes of juice because it is the cheapest price because its 0.36 while the other two are 0.37.