Strap in for possible sticker shock at the pump as what's expected to become Tropical storm or Hurricane Barry churns in the Gulf of Mexico. Triple-A Auto Club South spokesman Mark Jenkins says on average Florida drivers are paying 2-dollars-and-64-cents a gallon this week, that's down about 4-cents from last week. But the price could go up by as much as 5-to-10 cents if the storm causes damage or flooding. The most expensive gas is in West Palm Beach, where drivers are paying 2-seventy-two a gallon, the cheapest gas is in Fort Walton Beach where drivers are paying 2-sixty-two a gallon.