I could be wrong, but I was told (don't know where) that it is illegal to directly pass on the flat fee that credit card companies charge per transaction. I do NOT understand why it's ok to do it this way though. Some are being charged much more than the flat fee if they have a big gas tank.
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Fraternally, DeltAlum
DTD
The above is the opinion of the poster which may or may not be based in known facts and does not necessarily reflect the views of Delta Tau Delta or Greek Chat -- but it might.