One day an extremely nervous dental patient came for a root-canal surgery. He was brought into the examining room and made comfortable in the reclining dental chair. The dentist then injected a numbing agent around the patient's tooth, and left the room for a few minutes while the medication took hold.
When the dentist returned, the patient was standing next to a tray of dental equipment, "What are you doing by the surgical instruments?" asked the surprised dentist.
Focused on his task, the patient replied, "I'm taking out the ones I don't like."
Patient- Dr. How much it will cost me to extract my two teeth?
Dentist- $300 US dollars
Patient- How much time it will take?
Dentist- Five minutes
Patient- Five minutes only & it's $300 US dollars! Don't you think that is too expensive?
Dentist- I can do it in 30 minutes if you want?