To find out how many ounces are in one gallon, we can use the relationship provided in the table.
From the table, we see that:
- 5 gallons = 640 ounces
To find the number of ounces in 1 gallon, we can divide the number of ounces by the number of gallons:
\[ \text{Ounces in 1 gallon} = \frac{640 \text{ ounces}}{5 \text{ gallons}} = 128 \text{ ounces} \]
Therefore, there are 128 ounces in one gallon.