What happened to the money Hally was supposed to use to buy his textbooks?

Hally's father borrowed the money from his son that was supposed to pay for his textbooks.

For your information, I still haven't got that science textbook I need. And you know why? He borrowed the money you gave me for it. . . . Because I didn't want to start another fight between you two . . . He says that every time . . . all right, Mom!