Hey, for anyone who gets approached by store personnel doing this type of job just tell them you're trying to figure out what groceries your (or mother's /grandmother's) medicare plan covers.
Some advantage plans give money on a debit card for food and/or OTC items each month. You may have seen commercials. But they don't tell you exactly what you can buy. You have to download their app and scan every item in the store that you want to buy to see if it's eligible. If you have even one ineligible item in your order the card won't work for the entire order.
It's a good ruse. I actually spend about an hour in the store scanning stuff for one of these insurance "perks" and wasn't approached. But it was Dollar General where just about everything is ignored.