Traintickets can be bought at the trainstation. From Schiphol Airport to Amsterdam Central Station and vice versa costs € 4,70.
Tramtickets can be bought at various sale points and inside the trams. Different tickets are available
from a 1 hour ticket of € 2,90 up to a 7-day ticket for € 34,00.
Make sure to check in and check out with your ticket everytime you enter and leave a tram.