Please accept this as payment

Derek found a song he wanted to download to our Dance Central game. Knowing that we wouldn't just let him download it (costs about $5) he started rifiling through his drawers looking for money. He found this:

Money leftover from his trip to the Ukraine. 58 Urkraine Hryvnia. Once he checked the conversion and saw that it's about $7 USD he took off to download the song. Hey, wait! What exactly am I supposed to do with this? Guess I'll add it to our 'foreign money that is not worth the exchange fee to change into euros' collection.