[Costco] Improve price comparison tools for consumers

tired of the anecdotes. here's what i actually found after comparing unit prices on 22 household items across both stores using popgot. costco cheaper: paper towels, trash bags, laundry detergent, dish pods, olive oil, coffee, vitamins, protein bars. margin varies but costco wins consistently on all of these. walmart cheaper: several store brand canned goods, some condiments, certain cleaning sprays where the great value version beats kirkland per oz. essentially a wash: many snack categories, some cereals, various frozen items. the membership fee ($65/year) pays back in roughly one quarter of buying the costco-winning categories if your household consumes them at normal rates. if you only shop there twice a year it doesn't make sense. if you're doing a monthly run for consumables it does. the "costco is always cheaper" claim is not accurate. the "costco is cheaper on a specific set of high-consumption staples" claim is accurate. know which categories you're buying before deciding.