Medical Marijuana

I am a disabled person in Florida. They pass medical marijuana in florida. Thats great . Well when you go to dispensary and the prices are so how. Im on disabilty dont have alot of money. Dont understand how they can do this. Im been in a dispensary in Vegas it dosent charge as much florida. And i have several medical issues that i use it for. II go with out . cant afford the prices at dispensary. Ive been there three times and it totaled almost Six hundred dollars. And the only reason. I wAs able to do that. My daughter paid the bills. My daughter cant keep doing that so im not going to beable to get it. The pharmacy only charges like two dollars for oxycodone. Why so much for medical marijuana.