I would say you got taken not once...but twice.

First.....the dollar and euro are now real close in value....certainly not about a twenty percent difference on a 44 dollar tab. Second......the extra ten buck tip...who knows???? Seems a bit high.....but service is usually included in the bill on the french side.

the main question is.......did u enjoy your day???? and would twenty bucks either way would change that? Chalk it up to a learning experience.