Question

A 60 ounce glass bottle of juice sells for $4.20 while a 1.5 liter of the same juice sells in a plastic bottle for $3.06. Compare the unit prices of the juice for the two containers. (1 liter is approximately 34 ounces)
a.
The juice in the glass bottle is 1 cent cheaper per ounce.
b.
The juice in the plastic bottle is 1 cent cheaper per ounce.
c.
The juice in the glass bottle is 10 cents cheaper per ounce.
d.
The juice in the plastic bottle is 10 cents cheaper per ounce.

Answer 1

Glass: $4.20/60 oz = $0.07 = 7¢ per oz.
Plastic: $3.06/(1.5×34=51 oz) = $3.06/51 = $0.06 = 6¢ per oz.

So the plastic bottle is 1 cent cheaper per ounce. (b)