The national average price for regular gas slightly decreased on Friday to $3.156 per gallon. 

This is a decrease from Thursday’s national average price of one cent per gallon, according to AAA. There has also been a drop in cost compared to gas prices earlier this week, when gas was $3.163 per gallon. For the most part, gas prices have remained between $3.13 per gallon and $3.20 per gallon since June.