Gas prices went up more than 30 cents a gallon last week. How high could they go?

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Gasoline prices are displayed at a Mobil gas station on April 29 in Portland, Ore. Jenny Kane/AP hide captionGas prices in the U.S. have gone up more than 30 cents a gallon in the last week and are slated to continue rising as the Strait of Hormuz remains closed amid the Iran war.The cost for regula