Yeah, a gas station once tried to cheat me out of $2 change. It failed to add up as I was walking out to the car, so I went back in and confronted them. The young lass told me she gave me what she was supposed to and printed out the receipt to prove it. I said the receipt was wrong. She was not convinced, so I demanded she use a calculator. I got my $2, and a disturbing sense of how dependent many young people are on machines. When I worked retail, I always counted the change in my head.
Excellent story, and one well worth heeding.
Twice, on airlines, (back in the late 1990s), flying between the UK and Ireland, I was overcharged for duty free booze (which I had bought as gifts) I had bought on the plane.
Calculating it in my head - irrespective of currency used, and rates of exchange - the change I received was not remotely what it should have been. In essence, I had paid in one currency, and been given change in the other, but no calculation on the planet would have given me the change I received.
Thus, twice, I had occasion to summon stewardesses to ask about this and seek some clarification (and, the first time, I had spent quite a few minutes mulling over and planning how precisely I was going to phrase what it was that I wished to say).
Anyway, I showed them the whiskies, explained that I had paid in one currency and been given change in the other. I said I was a little puzzled as to what currency I had been actually
charged in and could they please enlighten me. Twice, there was an immediate response of embarrassed fumbling (the question wasn't ever actually answered) as lots more change - 'sorry, a mistake' they cried - was handed over to me.