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The Spinx card gives you 5 cents off a gallon for buying certain things in the store. There is a list of stuff up front you can buy that will give you 5 cents off. So he will go in there, get his lunch and a drink that will give him 10 cents off total. After however many days of doing this, it adds up and up, you can use the savings whenever, at 5 cents off, 40 cents if you want.... He just saved his up to $3.20 off each gallon.
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