Finding the foods you want at your local supermarket is something you're probably very familiar with. You go to the bakery for bread products and the butcher's counter for meats. Aisles are arranged by like products. Right?
This isn't always the case. You may not have noticed foods that go together are displayed side by side, even though they typically would be stocked in different parts of the store. Extra-thick, natural bacon and premium-brand refrigerated hash browns (neither is on sale, of course) get placed next to the egg shelf. Or an organic salsa gets placed next to tortilla chips instead of on the condiment aisle with all of the other salsas. The store's motivation in doing this is to suggest tasty (full-priced) pairings that you'll grab out of convenience instead of going to the other side of the store to compare prices.