Both mother and father were quite polite to their daughter for about a week. Then one evening Mr Wormwood came home and said to his son, `Well, my boy, I sold five cars today! Sawdust in the gearboxes, the electric drill on the old clock, a bit of paint here and there, and the stupid people couldn't wait to buy.' He took a piece of paper from his pocket. `Get some paper and a pencil, boy. I want to see if you're clever.'
The boy got some paper and a pencil and returned.