To find the unit rate price per ounce, you divide the total price by the number of ounces.
The total price is $3.20 and the number of ounces is 64.
Unit rate price per ounce = Total Price / Number of Ounces Unit rate price per ounce = $3.20 / 64 oz = $0.05 per ounce
So the correct response is:
$0.05