Complete ignorance about this, but I guess this is how accounting works. You need to track how the money flows, so you write -$10 fives times and +$10 five time

Complete ignorance about this, but I guess this is how accounting works. You need to track how the money flows, so you write -$10 fives times and +$10 five times. You end up in the same position, but now you can track where the money went and how it came back to your wallet.