At the grocery store one brand of ice cream costs $4.50 for 48 ounces. The same brand costs $7 for 138 ounces or $3 for 64 ounces. Which size has the lower unit price?
To find the unit price, we need to divide the cost by the number of ounces.
For the first option, the unit price is $4.50 / 48 ounces = $0.09375 per ounce.
For the second option, the unit price is $7 / 138 ounces = $0.05072 per ounce.
For the third option, the unit price is $3 / 64 ounces = $0.04688 per ounce.
Therefore, the third option has the lowest unit price.