Start the third level of this game and when you do you will spawn with some trucks and a shiny case.

Turn completely around and go behind the crate to the left.

You will find a ladder. Go up the ladder to the top of the crate, and keep going.

Eventually you will see "press X to jump". Ahead will be a chest and if you open it their is 1,000 dollars in there.

Go to start, quit, hit OK and then save your game. You can then repeat this!