$30 said the paper sign on the spell book, so the high school teacher, Marry Sullivan, picked it up and examined it. It seemed to be attached by a chain and lock, so she asked the kid at the garage sale to unlock it. She paid the 30 dollars and went home. When she got home, she graded her students papers, which took a while, because they were 3 page book reports, and she has 29 students, so that is 57 pages of reading.
"What a coincidence," she thinks as she grades the book reports, "I'm 29 years old."