Gas prices have been bouncing back up. According to Triple-A the national average for a gallon of regular this morning is 3 dollars and 35 cents. Mississippi is the cheapest at 2.88 a gallon. California is the most expensive at 4.83 a gallon. San Luis Obispo County is averaging 4.99 a gallon. In Santa Barbara County a gallon a regular unleaded is averaging 4.85 a gallon.