Can you provide an in-depth solution for: A local gas station is selling gas for $3.00 a gallon.  An app company is offering $.20 cashback per gallon if you fill up at this station.  If someone buys 10 gallons of gas, how much with their gas be, after the cashback rewards?Hey there, could you help me solve this math problem: A local gas station is selling gas for $3.00 a gallon.  An app company is offering $.20 cashback per gallon if you fill up at this station.  If someone buys 10 gallons of gas, how much with their gas be, after the cashback rewards?