In the B1 dictation 'Chez le mécanicien', the 's' on 'vingts' in the phrase 'deux-cent-quatre-vingts euros' was marked wrong.
The best answer is:
- Ça fera deux-cent-quatre-vingt euros s'il vous plaît.
However, in the attached grammar notes (Numbers 70 to 999) I found this:
J'ai quatre-vingts euros. I have eighty euros.
-> here euros is not a numerical adjective, so you agree.
I took this to mean that the 's' should be there as there's no following number. Is there an error in the dictation marking or is there something I'm missing?