You've found a substantial amount of money on the floor (based on a true story)

[dr3b]

I would be tempted to take a bit off the top, but I would hand it all in as it is a large amount of money and the person who dropped it would definately miss it.

If it was only £20-40 I would probably accept it as a donation to myself through Karma (I know that's not how Kamra works).