I'm sorry but that sounds ridiculous, do you have actual experience with this sort of thing? I don't, but I'd be pretty blown away if a supply chain logistics expert came in here and said that groceries cost less in rural locations because people don't eat out as much. Why would they be unable to account for that? Do you really think urban consumers have random and unknowable patterns of grocery consumption that would lead to more spoilage?

I'm gonna need to see some sources to back up this claim.