Tribeca is a neighborhood in Manhattan. Everything in Manhattan is more expensive, simply because of the cost to rent the store. [Not denying there are other factors, but that will be a big one, simply because Manhattan cannot grow outward any more.]

Rochester is a large city in the north of New York State, on the banks of Lake Ontario. It has plenty of room to grow out - and it's surrounded by rural counties. Eggs are cheaper there simply because there are more chickens and less humans than there are near Manhattan.

Again, there are unfortunately other factors in play. But surely they could've used a better example than the price of eggs in two such disparate parts of the state?