30% higher is because of the prices you're buying between grocers.  given, everything is a given in prices. but i'd say that chips are most susceptible to price-gouging because of the ratio of nitrogen gas to chips to meet with supply and demand. so you're paying more for less on that note. i'm not much of a connoisseur in terms of snack foods. but i figure you can go a long way with buying store brand chips (or store brand everything) or buying a brand that's been least affected by shrinkflation (i.e. zapp's).
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