What are the costs of prostitutes in Amsterdam?

I am posting this here for the send time because the first time i made a thread, NOBODY gave me the answer im looking for!! just answer the question PLEASE! I am thinking of going over and hiring 4 prostitutes for about an 1-2 hours and having an orgy. what will this cost me? Remember, its not 4 girls at seperate time, its 4 different prostitutes and me at the same time (an orgy) for about 1-2 hours. How much will it cost?? JUST GIVE ME THE FIGURES!!!! NOT any advice!

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