The soda thing is pretty crazy. I’ve mentally tracked it for about 20 years and Costco never beat supermarket sales for. Are brand soda. It was almost absurdly overpriced for something at Costco. Now their every day price is cheaper than the cheapest weekly deals.
20 years ago you could routinely find 12-packs for $2-$2.50 when bought in bulk. Today $5.50 is the best I’ve seen (48¢ a can). Costco is $15 for 35 (40¢ a can).