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The average price of a gallon of regular unleaded gasoline in Florida reached $4.50 on Monday, and more price hikes could be coming.

Average gas prices were up 29 cents a gallon from a week earlier and 50 cents from a month earlier, according to the AAA auto club.

Prices are expected to continue going up because of factors including higher demand during the summer driving season, a decrease in domestic oil supplies and an increase in U.S. gasoline exports.

AAA spokesman Mark Jenkins said the increased fuel costs are being felt throughout the economy. โ€œAmerica runs on diesel and gasoline,โ€ Jenkins said. โ€œSo, when those prices are much higher, that raises the cost of transporting your goods. So, getting groceries to the grocery store costs more money and delivering things to your doorstep will get more expensive.โ€

The most-expensive gas in Florida is in Palm Beach and Broward Counties, while drivers in the Panhandle markets of Pensacola, Panama City and Fort Walton Beach are paying the least.

โ€œWe never really thought that weโ€™d be at four dollars a gallon,โ€ Jenkins said. โ€œNow, itโ€™s really quite a surprise to see us at $4.50. There are just so many factors coming together to create this unwelcome recipe for higher prices at the pump.โ€