Found $40.00.
I rushed to give the money back before I am tempted to spend it. That is better than spending, but it is not the best course of action, because it allow the temptation of others to get involved. The correct course of action is to give my number to the store clerk letting know that I have found some money, and if anyone comes looking, then they can call me, and let me know how much they have lost, and if accurate, I will give it to them. If I do not hear it from anyone in 2 weeks, then I will donate the funds to someone needy.
The answer lies in not rushing to do the right or the wrong thing, but thinking about it so that its best for everyone.