l'addition = the bill

If you are going to the restaurant or café this weekend here is a good one:
Ask for "l'addition" = "the bill" when paying.
You can even try a "Garcon! L'addition s'il vous plait!" or "Mademoiselle! L'addition s'il vous plait!" = "Waiter! the bill please!"

When the bill is really higher than expected, you can say it is "salty" = "salée" (as opposed to "sweet" I suppose...) = "L'addition est salée".