Alvin completely filled his 21-gallon
tank of gas with regular fuel for $55.23.
As he left the gas station, he noticed
the station across the street sold
regular fuel priced at $2.56 per gallon.
How much money could Alvin have
saved per gallon if he had gone to the
station across the street?


PLEASE HELP ME I AM FAILING IN MATH AND SCIENCE I REALLY NEED SOMEBODY 'S HELP ON THICK QUESTION ​