A mother took her young son to the dentist because he had a bad tooth that needed to be pulled.

Before the procedure, she asked the dentist, “How much will it cost?”

The dentist smiled and said, “Don’t worry, madam. Pulling one tooth is only $20.”

The mother nodded, relieved, and sat down in the waiting room while the dentist took the boy inside.

A few minutes later, the office was filled with shouting, crying, and loud screams coming from the treatment room.

The mother jumped up nervously, while the receptionist tried to calm everyone down.

Finally, the dentist came out, looking exhausted, holding his gloves in one hand.

“It’s done,” he said.

The mother sighed with relief. “Thank goodness. So I owe you $20?”

The dentist shook his head. “I’m sorry, madam, but I’ll have to charge you $100 for pulling your boy’s tooth.”

The mother stared at him in shock.

“A hundred dollars?” she exclaimed. “But you said it was only $20!”

“Yes,” replied the dentist, “but he yelled so loudly that he scared four other patients out of the office!”