I wish stores would consistently advertise unit price, like the cost per oz/ml/g.
I really only shop for food based on unit price, but sometimes there’s no consistency with the unit of measurement among different stores or even the same store!
And some stores will put items on sale with a unit price, but you don’t know if the unit price is the sale amount or the regular price…
It’s like stores either don’t want you to spend money there, or they do their best to confuse the hell out of people.