I've found that a carpenters' apron is marvelous for carrying cash. It has multiple pockets, and one deep enough for a billfold. Lots of pockets for change. But do keep the wallet ON YOUR BODY and never, never walk away from the cash box if that's what you are using. One of my friends put a cardboard box over her cash box while she ran inside to get a soda and it was gone when she returned. No one saw a thing, of course.