Julie bought g gallons of gasoline for $2.55 per gallon and c cans of oil for $3.45 per can.
a. What expression can be used to determine the total amount Julie spent on gasoline and oil?
b. If she bought 7.8 gallons of gasoline and 6 cans of oil, how much did she spend in all?
b. Find how much Julie spent using the given values.
Julie spent $ in all.
(Round to the nearest cent as needed.).