No idea where you got that price from. If it was from a sheet on the door of the room than you can ignore that, those are theoretical prices as I've seen so often in many hotels, they are always way too high for some reason.
I checked online and these are the current prices:
http://www.tulipinnhilversum.nl/reservation/rates.aspxEven so, hotel room rates are often negotiable these days, they are happy to fill rooms.
I think we did get a very reasonable deal for sure and the hotel was better than I had expected. It was also brilliant that it is at walking distance.