Here in the states and i am sure it is everywhere the same for paypal, But paypal charges 2.9% per transfer, well at least thats what happens on our donate meter.
80*2.9%=2.32 <-- is what they will be charged
If sending to a business don't worry about it cuz they usually eat it i guess. So just send what your told to send.
Hope that helps
=DHG= Col.Kilroy
www.doghousegamers.com