All very good questions. Nothing is weighed. It's just bigger boxes of the stuff. For example, let's say you're buying K-pods for your Keurig coffee maker. In a grocery store, you would buy a 12-pack and pay anywhere from 4.99 - 7.99. At Sam's Club, you get a huge box of them 100 for 39.95. So you buy in bulk, you save money.
They do sell clothing-usually, it's close-outs or all they have left is sizes XS and Small. And the clothes run small as well. It's good stuff-just to fit smaller people. They do have some furniture-mostly office furniture. But they did have a couch and mattresses of all sizes. Food-a LOT of it. Frozen and fresh whichever you want. All kinds of chips, cakes, candy, bread, pop in bigger cases, bottled water and all that stuff. Just bigger bags of everything and cheaper prices. The have a ton of housewares stuff too, like Lysol (4 giant cans for 10 bucks and trash bags, 200 of them for 12.99. They also have stuff that restaurants use too like pots and pans. And lots of electonics-big TV's and computers of all sizes. It's a lot of fun to just go in there and look around.