To find the unit rate price per ounce, you need to divide the total price by the total ounces in the bottle.
Tony has a 64 oz. bottle priced at $3.20.
The unit rate price per ounce can be calculated as follows:
\[ \text{Price per ounce} = \frac{\text{Total Price}}{\text{Total Ounces}} = \frac{3.20}{64} \]
Calculating this gives:
\[ \text{Price per ounce} = \frac{3.20}{64} = 0.05 \]
Therefore, the unit rate price per ounce is $0.05.