I had a disagreement with a co worker last night about gas prices

I’m probably wrong as usual. May not look the same but it is. The state I’m in the average of gas is $6.43 but it affects everyone the same in their pocket books if you lived in another state. I lived in 4 different states in my life time. It’s different cost of living in other states. I told him if you lived in Tennessee you be paying same amount you are here because cost of living is lower. So in actuality everyone is paying same amount.