You don't have to wait.

Go to a store with a young adult at the check out and buy an item for say $1.27 and give then a five dollar bill.

If the cash register it not a computerized and shows the change due from the five they have to call the manager to determin what amount they should give you.

Sad but true, at least in my experience.

Wishing all enough,
Dick Staeffler R-3828