Yours for $15

On the bus on my way to work this morning I found fifteen dollars, in crumpled, used and non-sequential $5 notes. The bus had just turned at the terminus to re-trace the route, and no-one was sitting near me when I sat down and found the notes - so I am presuming their owner was no longer on board.

What do I do with the cash, which is now burning a hole in my wallet? Your comments and suggestions are welcomed.

*j*