Gas prices across Pennsylvania are lower this week than they were last week. That’s according to Triple A, which says the average cost per gallon is down by about three-cents compared to last week, currently at three-dollars and 22-cents per gallon. Prices across the state still remain higher than the national average, which is currently at three-dollars and 14-cents per gallon. Here at home, the average cost of a gallon of gasoline is three-dollars and 29-cents.