Dr. Jones had a difficult time convincing Peter that he needed to get operated for his appendix problem. Peter finally agreed and asked the doctor about the expenses involved in the operation.
Dr. Jones said, "Well, it will cost you around 10000 dollars."
Seeing the hesitation on Peter's face, Dr. Jones said, "Listen I will make it easier for you. You can pay me an advance of 3000 dollars and give me the balance amount of 8000 dollars in small installments of 1000 dollars each month."
Peter said, "I feel like I am buying a car."
Dr. Jones nodded and said, "You are absolutely right - its not you but me who is buying a car."