I bought a book at the dollar store. While I was at the check-out the young cashier became very interested in the book and asked if their were more copies.
Unfortunately, that was the last one.
After paying for my book I saw the manager and walked over to him. I gave him the receipt and the book, asking him to give it to the cashier. (I didn't know if she'd get in trouble if I gave it directly to her.)
I think it made both the manager's and cashier's day. They had smiles from ear to ear and I had a smile in my heart.