UPDATE
People in PR now into their second week without basic supplies and medicines.
http://www.msn.com/en-us/news/us/in-puer...ocid=spartandhpNote that some people talk about having less than $20. It's getting near-impossible for them to buy basics, assuming they can even find a store with the basics.
From time to time there are general stories in the press in the USA about why we should become a "cashless society". This shows why that is such a bad idea.