I think it was $140 per person--something like that. They provided breakfast, lunch and beverages. It was really a great trip, I highly recommend it.
One suggestion if you go to the Belize Zoo, buy some water from the vending machine (BZE$1 per bottle) just inside the entrance to take with you on the tour...it gets hot and you'll start to get dehydrated. If you have any more questions about cave tubing or AC, you can email me at [email protected]