What currency does warmane use?

For donating? I need to know so i know the cost in US Dollars...

Click on donate and check what payment options and currencies are available to you.

It doesn't say, i'm using visa, that's one of the options, but it doesn't say what currency it uses: for example it says 10 coins = 10
There's a symbol next to the ten, but idk if that's a euro symbol or not