[I can't understand where the money goes when withdrawing]

Hello. I've been working on Fiverr for over a year and I keep asking myself the same question... When I withdraw my balance, numbers are thrown around that i can't understand.

As an example: 

The site tells me at the top 100€.

When i click on it, it appears : Balance available for use: 135$ but it should be 110$ from Euro in Dollar with the official exchangerate 

I mean, when its 135$ it should be 122€... So why its 100€?

Well, when i now go to withdraw that balance and click on paypal or payoneer, it tells me "Withdraw: 80€.

 

So where are the 100€? It just makes no sense...

 

Do Fiverr take 20% from the order and from a withdraw?

 

Thanks for all help, im very confused.