This is a rate conversion problem, if you've done those before that may help.
Start by identifying exactly what the question wants. In this case, that is found in the words "...how much money..."
So we want a total dollar amount. What do we need to find it? We are given a rate for money, 2.39 dollars per gallon. We need to find the number of gallons used to go 492.6 miles; this will enable us to find the total dollar amount driving that far costs.
We can find the number of gallons using the other given rate, 32 miles per gallon. You can think about this next part a couple of different ways, but you'll end up with the same numbers. The first is to invert the rate, or ratio, of miles per gallon into gallons per mile. If the car gets 32 mpg then it follows, logically, that every mile takes 1/32 of a gallon. That is, the car takes 1/32 gallons per mile driven. You can multiply this number by the distance driven in a week to find the total gallons used.
If that didn't make sense, you can also use algebra. Start by saying that:
Distance=Economy*Fuel
You want Fuel isolated, so divide both sides by economy. By dimensional analysis (unit math) this means dividing by mi/gal, which is equivalent to multiplying by gal/mi. The part that is in strike-through font is potentially confusing. If it doesn't make sense, ignore it. It might help you long-term, but isn't really important right now.
Either way, you end up with equivalent expressions for the number of gallons. Multiply the number of gallons by the price per gallon and you'll get the total price.
Make a comment if you need to help identifying which part is which, etc.
