Money vs Morals

You see a $20 dollar bill on the ground at school what do you do?

You are leaving a store when you realize that you were undercharged what do you do?

If you see a homeless person do you feel obligated to help them out?

You see someone accidentally drop money on the ground what do you do?

There is a an opportunity to earn money if a task is done. You and your friend decide to take the opportunity and split the reward 50/50. Turns out by the end of the task you found yourself doing most of the work. Once you get the reward what do you do?