I'm one of the people that change prices in a grocery store. "Shrink-flation" has been horrible this year. Prices change very slightly or not at all while case quantities or package weights have been dropping.
I hate it because aside from me telling them constantly, it's changes that are almost invisible to management. If prices were just constantly going up, I'd have more of a leg to stand on with asking to reduce margins or going aggressive on sale pricing.
I like what that one grocer did in the article, calling it out for the customer. If we did it, though, the store would be littered with those signs, and customers would just go to another store that didn't use them.
I’ve started to pay more attention to Costco’s “price per unit” entries on those tags, I just wish that other stores that have lots of comparable items side-by-side would do it.
There's one store (I think it's Walmart but I'm not 100% sure) that will put the price per unit on everything, but in one product category you might have price/100g, price per individual item (1 cookie), price per sub-packaging (sleeve of crackers in a box), or it'll count the entire product as 1 of 1 units.