Myth: You really don't save that much if you pay with cash for your gas. Answer: False. Some gas stations are offering a 5-cent- to 10-cent-per-gallon discount if you pay cash. To beat their competitors and to win more customers, more gas stations are displaying two price signs -- one for cash and another for credit/debit card purchases. The idea is to avoid passing on expensive "swipe fees" to customers. Last year, debt/credit card fees averaged 4.7 cents per gallon at gas stations and convenience stores.
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