Given:
A certain shampoo is available in two sizes.
The first size: A 12.6-ounce bottle costs $2.37
so, the unit rate is:
so, Unit price for the 12.6-ounce bottle: $0.188 per once
The second size: A 25.3-ounce bottle costs $5.24
so, the unit rate is:
So, Unit price for the 25.3-ounce bottle: $0.207 per ounce
So, the better buy is: The 12.6-ounce bottle.