The price of a gallon of gasoline tops $3 across much of the state, which is up more than $1.20 from a year ago, according to AAA. The average price for regular gas in Texas stood at $3.03 per gallon on Sunday as crude oil prices continue to creep up, closing above $80 per barrel. Crude oil price is one of a quartet of factors that influence the cost of gasoline, reported The Dallas Morning News. The cost of refining, distribution expenses and taxes also affect the price at the pump.“Things have really picked up steam in terms of national ...