Translation of surcharge in German

From my experience it is better to test it first with other students. It is difficult for me to give you exact information without knowing your teacher's needs. Please send me your email address.
In addition, after the tests I would like to give also a presentation to some of the teachers, as usually the different ideas come with the presentation. After speaking with them, some ideas emerge...
The ferry took me to the island. Sitting next to me there was a local guy with two packs of beer, and he seemed pretty drunk for this hour of the day. He offered me some beer and I was polite.