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It’s interesting that all the grocery stores with automated checkouts I’ve been to have single lines for multiple automated checkouts, but multiple lines/single

• foolfoolz 8y ago
  that happens a lot at grocery stores because of carts. it’s even more obvious at costco. stores where people are more likely to hold items in their hand or a small basket can do global queue like home goods or old navy. but once you have 10-40 carts lined up it’s a shit show. imagine costco on the weekend with everyone trying to push their cart through a maze of switchbacks. self checkout likely has less carts through it than staffed chashier lines. also their close grouping makes this a little less of an issue