To the attention of the shopkeeper who has repeatedly been trying to shortchange me during my lunch pause:
Either you are in good faith, and truly unable to count up to 20 euros without getting it wrong more than 60% of the time.
In which case, I would strongly advise for a career change.
You are just another average money-grubbing lowlife trying to improve his profits and survive in the dog-eat-dog world of small businesses by less than commandable means.
And I would then have to question the wisdom of running such a trade across the street from one of Paris’ major universities, specializing in Science and Mathematics.
If anything, I feel a bit insulted.