At the grocery store, one brand of ice cream costs $4.50 for 48 ounces., the same brand costs $7 for 128 ounces or $3, for 64 ounces. Which size has the lower unit price?

Question

A: 48 ounces
B: 128 ounces
C: 64 ounces
D: they cost the same per ounce

Answer 1

To find the unit price, we divide the price by the number of ounces.

For the ice cream that costs $4.50 for 48 ounces, the unit price is $4.50/48 ounces = $0.09375/ounce.

For the ice cream that costs $7 for 128 ounces, the unit price is $7/128 ounces = $0.0546875/ounce.

For the ice cream that costs $3 for 64 ounces, the unit price is $3/64 ounces = $0.046875/ounce.

The size with the lower unit price is C: 64 ounces.