The consumer prices just uppdate faster. All prices change its just that the grocery shop around the corner has already stocked up on some thousands of coke bottles for 1.50$ so they will sell them for that.
Gas stations uppdate thieir prices more dynamic and often for one becuse its easy(supermarkets already experiment with digital pruce tags to be able to do the same) and because drivers can realy choose where to go and will drive 5 minutes to get to the next cheaper station.
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