Mom's Checks

A kid called up his mom from his college and asked her for some money, because he ran out of it. His mom said:

- Sure, sweetie. I'll will send you some money. You also left your calculus book here when you visited 2 weeks ago. Do you want me to send that up too?

- Uhh, oh yeah, okay - responded the kid.

So his mom wrapped the book along with the checks up in a package and went to the post office to mail the money and the book.

When she gets back, her husband asked:

- Well how much did you give the boy his time?

She said:

- Oh, I wrote 2 checks, one for $20 and the other for $1000 out to him.

- That's $1020! - yelled her husband.

- Are you crazy?

- Don't worry, Hon - she said.

- I taped the $20 check to the cover of his book, but I put the $1000 one somewhere between the pages in chapter 19!