Per the last two replies:
Depending on what airline is used and what day you travel, the amount of the flight varies by hundreds of dollars at least.
When it comes to the hotel, I'm guessing they use the maximum rate, which I believe can be seen on the inside of the room door.
I say this because the total prices of the vacations on this and other shows seem VERY high compared to what a consumer can book themselves when wanting to go on a trip. (I also think this is the premise for the original question. I apologize if I'm incorrect on that.)