Pretty simple, but few people carry cash money anymore (what a damned shame).  I ALWAYS have money on me because I refuse to have credit card debt. 

BTW, my fridge seals were fine and all three freezers were fine, and our two little "camping fridges" were also just fine.  Good deal.  This is good information to know.  Who needs to pay HIGHER electric bills, right?

https://www.farmersalmanac.com/tips/dollar-bill-test