Ukrainian here, smaller town. Most stuff is purchased on a street market a.k.a. bazaar. But there are also two competing grocery chains, Tavria V and ATB. It’s like RED and BLU. Left twix / right twix situation. They are everywhere. Anything that isn’t no-name (and is food) is probably cheaper there than at a bazaar. Though I once saw them sell tiny ass stollen loafs for 12 whole bucks because “it’s a slightly niche foreign recipe so it must be expensive” (and same with pretty much everything else in there). Might not sound like a lot but this is a week worth of (other) food, idk how much stollen costs for neighboring countries but went on amazon.de and scrolled for a little bit to find a similar thing for 2 euro.

Bigger cities have one or two really large (3+ story) buildings, which are renting spaces for the two competiting grocery chains, arcade halls, casinos, pizza/burger stuff and small stores selling random foods by weight. When one enters, all sense of time is lost.