Free Lunch

So K started all day school this year.  Since she eats lunch at school I send her with a lunchbox filled with yummy and nutritious things for her to eat.  About 5 days into school she came home with a note from the lunchroom saying she owed $1.75 for lunch.  I asked K what she had for lunch.  Her response?
"I had lunch at school.  It is free!  All I do is push my number on the keys and they let me eat!"

o.O

We have had a good laugh over K's "free" lunch several times since then.  Oh, and we have had several discussions about what it means to have a lunch account and what happens when you "just put in" your number!