Thats theatrical money. The cheaper variety.
What I would is go buy some play money that looks real. Then go back to the store and if the guy is there, toss the money out the window as you drive off, then stop and watch him rush to pickup the fake cash. Then he will either notice it is fake and throw a fit or go into the store and attempt to buy stuff with the play money.
https://www.amazon.com/Motion-Picture-Replace-Pretend-Counting/dp/B07WQYC733