The price of gas is less than four-50 a gallon. The national average price for regular is down to four-49 gallon, according to Triple-A. That's three cents lower than on Monday. The statewide average is down three cents in South Carolina, to three-99 a gallon. South Carolina is the first state to fall below four dollars a gallon but it likely will soon have company as Texas is down to an even four dollars a gallon.