That will be $500.”
Dr Young (after having lost $1000) leaves angrily and comes back after several more days. Dr Young: “My eyesight has become weak I can hardly see!”
Dr Geezer: “Well, I don’t have any medicine for that. Here’s your $1000 back.”
Dr Young: “But this is only $500!”
Dr Geezer: “Congratulations!
You have got your vision back! That will be $500.”
