2 things surprised me in French stores
When you buy clothes in France, discounts are everywhere.
However, in Czechia you usually see final prices on tags. In France discounts are more frequent, nobody wants to stick new tags, so they just tell you that discounts are, for example, 40%.
You'll find the final price, for example, in fitting rooms in a table:

And if you have a large family, maybe buy 11 baguettes:
