I never use cash for anything so when they ask for $ for food I can tell them I don't have any. I might have an emergency stash in a separate place but I don't use that for myself either. When my wife worked downtomn and there was no where to park I would have to pick her up and they would always stop and ask for money for food so I would tell them i don't carry any cash as I use the bank card for everything then offer them some food that I carried with me and they never wanted the food.