Question: 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?
Answer: 
Gas is $3.00 a gallon and they buy 10 gallons of gas so that's 3*10 = $30.00
The app is offering $0.20 cashback per gallon and they buy 10 gallons so that's .20*10 = $2.00
They spent $30.00 on gas and their app is offering them $2.00 cashback so they spent 30-2 = $28.00 per gallon