I know that with my course, my instructor gave me the price of the course with the materials. Then he also told me that there would be extra costs for equipment rentals if needed, dive site charges and possible boat charges. Of course, he couldn’t give me a final definitive cost because we could not predict water roughness, etc. Everything depended on weather, tides, dive locations, etc. So long before taking the class, all "possible additional charges" were disclosed. I knew that the cost of the course wasn’t going to be the only charge involved.