An Engineer opens a hospital

James, an unemployed engineer decides to change his fate by opening a whole new type of hospital.
In the front door he writes: "We can cure all your diseases for only 500,$, if we can't, we give you 1000$"
A real doctor sees the sign and think he can win money easily and you can't decide to be a doctor whenever you want. So he goes inside and tells to our engineer:
-I can't taste anything! Everything is like water to my mouth
-OK I see... NURSE! Can you give me the box 34 of the room 3 please?
The nurse brings him the box and the engineer opens it and takes the little bottle inside
-OK, you have to drink everything in that little bottle
And so, the doctor drinks
-BUT! Eeeew! That's gasoline!
-Exactly! Congratulations, you have your taste back! That'll be 500$
Two days later, the doctor is pissed off and wants to get back his money so he goes to the hospital again
-This time, I don't have any memory, I can't remember anything and I can't live properly
-OK, I see... NURSE! Can you give me the box 34 of the room 3 please?
-But... But... That's gasoline! I don't want to drink again!
-Congratulations! You got your memory back! That'll be 500$!
The doctor is really mad and decide he will go to the hospital once again and this time he will have his money back!
-Hello, it's me again! I got hit by a truck and I lost my eyesight, I can't see anything!
-Well sir, I'm sorry but I can't do anything for you, here, have 1000$!
-But, this is just 500$:
-Congratulations! You just got your eyesight back! That'll be 500$!