Milk is around $4 a gallon where I am.
The average for gas is 3.20. but I can get it for around 3.15 this week, last time was 2.95.
Both are thing that probably vary a lot depending on where you live.
I agree that where you live makes a huge difference......even in a small area. My wife's nephew managed a Market Basket grocery store.........the Texas chain of 34 for stores (not the New England chain of the same name with 89 stores).
There were some products he didn't carry in his store because the price, product or size would not sell at his location.
He did not carry 2 liter bottles of soda. He only carried 3 liter bottles, which are rare here in California except at like Dollar stores.....because they sold for almost exactly the same price as 2 liter soda, but you got 1/3 more.
He used to hate the flyer his chain sent out because there was always something he didn't carry, and he wasn't about to order a case of something when only one or two customers might ask for it because of it being in the flyer. He would just go to the closest store in his chain that did carry it, and buy the one or two he needed, or offer the customer a more expensive brand for the sale price.
As he put it, those flyers often contained items that very few of the stores carried, but somebody at the warehouse accidentally ordered and they needed to unload them.
One TV station I used to work at had a Wine expert on the Noon news once a month from a local specialty store. He admitted......off air only.....that the cheese or crackers etc. that he was pairing with the wine during the TV segment were items that weren't selling in the store and that they would sell out in a few days after being features on the show. He also admitted that he based what wine to showcase based on the other products that paired well with it that weren't selling.