Seeing that we're right off transfers, try this.
An old fogy physician, Dr "Geezer" was bored in retirement so decided to open a medical clinic.
He put up a sign which said "Get your treatment for $500 - if not cured get back $1,000.
Doctor "Young Gen" was positive that the old fogy knew nothing about medicine and thought that this was a good chance to get$1,000.
So he went to Dr Geezer's clinic and said " Dr, I have lost my sense of taste, can you help".
Dr Geezer said "Nurse, please bring medicine from box 22 and put 3 drops in Dr. Young's mouth"
Dr. Young "Aaagh - this is petrol".
Dr. Geezer "Congratulations, you have your sense of taste back, that will be $500 please".
Dr. Young was annoyed and was back next day trying to get his money back.
Dr. Young "I have lost my memory, can't remember a thing".
Dr. Geezer "Nurse, please bring medicine from bowl 22 and put 3 drops in the patient's mouth".
Dr. Young "Oh no you don't - that's petrol".
Dr. Geezer "Congratulations, you've got your memory back, that will be $500.
After a few more days Dr. Young is back trying to recoup his $1,000 "My vision has become weak".
Dr. Geezer "I don't have any medicine for that so here's your $1,000 back"
and with that hands him a $10 note.
Dr. Young " But this is only $10".
Dr. Geezer "You got your vision back, that will be $500".
I think there may be a moral here somewhere.