Buy at S´hol, its the ARTT, for about 36 eur gives you 3 days in a far larger area and includes both trains and also BTM=bustrammetro. Also for 2 or 1 day. With it comes a packet with map and details. Touristy forum on TripAdvisor has all detials.
Using above quotes: 2 busrides x 6,50, the trains 16 eur and GVB is NOT additional 1,20-how one comes to that is a mystery or a typo, its now 3,20 for a 60 mins. ticket. Total cost not that much different, but it saves buying tix all the time and also gives you what those from Uk seem to like so much: travel at will when the day is done in the area allowed. LOngest ride is Ams-Lelystad, change at Almere if coming from CS, ride through the newly won land on former SouthernSea and across a national park with loads of conflicts about to feed the Scottish Highlander big cattle there during winter-or not (as nature itself would have it). Come back with direct IC to S´hol again-or rather alight just before @ AMS South and then take the doubledeck coach to H´lem from there.
The BUS at S´hol has a mobile van at the main 397 stop to help all those confused tourists, it also accepts cash if wanted.
Above was mentioned the checkOUT of the now 6,50 90 mins BUStramticket for the Ams region-the checkout allows you then to make the transfer, it may block if you do not do this. And anyway, whats the hassle in fact for doing it. This ticket thus also allows the bus S´hol-H´lem, or the direct 80 beachside bus Z´voort-Ams, with a transfer to GVB tram in AMS.