One of the problems with dates is, it is different because of when its opened. If i buy a gallon of milk today and open it, it will go bad before a gallon of milk that was bought today but not opened for a week, same with bread and packaged deli meats. thats the kind of stuff that needs to be educated. put a QR code on each item that takes you to the FDA website for that kind of product that tells you "deli meat is good for 7-10 days after opening" and "xx amount of days since it was purchased" something to that extent, which would be good with born on dates.