A very practical idea

During an economic recession, a car mechanic is going bankrupt. Suddenly, he comes up with an idea to earn some more money. He puts a sign outside his workshop that says “Curing any illness - 200$. If we can’t, we will give you 1000$ back!”. A doctor walks by and decides to get some money from him easily. He walks in, hands the mechanic 200 bucks and says: -I have lost my sense of taste. Whatever I eat, it all tastes like nothing to me! -Nurse, medicine number 19, please! His assistant brings the patient a cup of some liquid and asks them to drink it. After drinking one sip, the doctor spits it out and screams: -Ew, that’s gasoline! Why did you give it to me? -Great, your sense of taste is back! Have a nice day! The doctor is angry, but he decides to come up with a better “illness” and come back again. The next day he shows up, gives the money to the mechanic and says: -I’ve lost my memory. I don’t remember recent events, please help me! -Nurse, medicine number 19, please! -I won’t drink that again, that’s gasoline! -Looks like your memory is back! Have a good day! The doctor is furious, but he still decides to come back and try again. The next day, he walks in wearing shades and holding a walking stick and throws the 200$ in the general direction of the mechanic. -I’ve gone blind, I can’t see absolutely anything! Can you cure my blindness? -Unfortunately, we do not have the technology and experience to cure blindness. Here’s your thousand bucks. -Hey, those are just ten 1$ bills! -Looks like your vision is back! Have a wonderful day!