They may be called gas stations, but the people who own them want you to fill up on drinks and candy bars and not their marquee product.
They make only pennies per gallon sold. Most of the profit, about 75%, comes from the markups on convenience store items such as sunglasses, hot food or medicine, according to the Associated Food and Petroleum Dealers, or AFPD, a trade association of independent operators.
So, when gas prices are high, they're watching the disposable income that usually trickles into their cash registers from snacks and motor oil disappear into gas tanks.
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