Given -
Large Size Box = 15 ounces for $3.14
Family Size Box = 24 ounces for $5.34
To Find -
Which size box of cereal has the lowest price per ounce, and what is the amount =?
Step-by-Step Explanation -
Per ounce price for Large Size Box:
15 ounces = $3.14
1 ounce = $3.14/15
1 ounce = $0.21
Per ounce price for family Size Box:
24 ounces = $5.34
1 ounce = $5.34/24
1 ounce = $0.22
So, Large size box of cereal has the lowest price per ounce.
1 ounce = $0.21
Final Answer -
(A) Large size at $0.21 per ounce