Cottage cheese is being sold in different size containers. the sizes and prices are given below:
4 - 5 ounce containers for $5.00
1 - 12 ounce container for $3.24
1 - 16 ounce container for $4.19

Unit prices
4-5  ounce container is about $0.25 per oz

1- 12 ounce container is about $0.27 per oz

1 -16 ounce container is about $0.26 per oz

Then the answer is a. the 5 ounce container; because its unit price is the lowest one. 

Hope this helps!

Are you trying to figure out the volume?

10.4 is the answer for you