which is the better value: a 15.3 ounce box of cereal for $3.37 or a 20 ounce box of cereal for $ 4.59

Question

The supermarket displays the unit price for the 15.3 ounce in terms of cost per ounce, but display the unit price for the 24 ounce box in terms of cost per pound. what is the unit price to the nearest cent given by the supermarket. does the better value always have the lower displayed unit price explain.

Answer 1

Many grocery stores do this calculation for you nowadays on the price tags! :)

 

What you want to do is find the Cost per Ounce of cereal and look for the lowest number.

 

In the first case, you have $3.37 per 15.3 ounces

Thus take 3.37 / 15.3 and you get $0.2203 per ounce or 22 cents per ounce

 

In the second case you have $4.59 per 20 ounces

Thus take 4.59 / 20 and you get $0.2295 per ounce or almost 23 cents per ounce

 

So the smaller box actually has a slightly cheaper cost per ounce associated with it.