@Michael-And-Mariluz0 I agree that Airbnb's currency conversions are often suspect, although I couldn't say what exactly is happening in your case.
I had a guest who had had a hassle previously with Airbnb regarding this. She was American, paying in US dollars, the host was American, getting paid out in US dollars. So there was zero need for any money to be converted. Yet they had charged the guest a currency conversion fee, and told her it was because the listing's location was in Mexico, and they wouldn't back down. That's absurd- no funds were "converted".
I would suggest that you change the currency you are listing in- there is no need whatsover to list in the currency of most of your guests. As @Angelica-Y-Jorge0 have pointed out, guests see the pricing on their end in whatever currency jives with their account.
And just because you don't like all the answers you are given, doesn't mean anyone here is some Airbnb shill- just other hosts trying to help you out. No need to be insulting to those who have taken the time to do that.