Must be a matter of regional dairy markets. Here, in SE Washington State, no change in milk prices or only a dime or two depending on the brand. Other things in supermarkets have certainly gone up, though. I also notice the “out of stock” situation occurring more frequently; not sure why. Is production limited due to higher input costs or the product is going somewhere else or distribution problems or what?
What I noticed was that instead of the shelves being full front to back with maybe 5 or 6 of whatever is in front, there are only 2 or 3 now. And the store where I do most of my shopping is slowly but surely getting rid of a lot of familiar name brands and going with their own brand. Also lots of frozen fruit and vegetables but not many in cans. My grandson can go through a large box of Grape Nuts in nothing flat. Had to ask the store manager to order special for me because they no longer carry them. Other stuff I have to order on-line like Cheer powder because no one seems to carry it any more.
Also see shelf stocking being done less and less by store employees and more by suppliers.