Answer:
Gerald bought
gallons of gas.
Explanation:
In order to answer this question we have to make the following assumptions:
Let the cost of gas be x dollars per gallon.
Total money paid by Gerald = $12.60
Mount of gas bought =
Formula:


Thus, Gerald bought
gallons of gas.
The amount totally depends on the unit cost of gas. For different rate different amount of gas could be bought in $12.60.