A count list is what the team taps to count — Store Count, Ice Cream, Breakfast, Pastry. Lists belong to a store, so Jerrol's and U & A each have their own.
Pick a section and walk the store one shelf at a time — Add everything shown puts that whole section on the list. Items already claimed by another list are hidden, so add-all is always safe.
Anything on display in a section but not counted there sits greyed at the bottom. Tap it to flip it either way.