Pennsylvania motorists are shelling out a little more cash this week when they top off the tank. As reported by Triple-A, the average price for a gallon of regular rose Friday in the Keystone State to three dollars, 72 cents, this as the corresponding national figure was also up at a few tenths over three sixty-three. Colorado remains home to the lowest gas prices, posting a figure of a tenth over three oh eight on Friday. At the opposite end of the gas-price spectrum, costs were up again in California, rising to just under five bucks, 44 cents.