So then my question would be- where does Amazon store their inventory? They still have to figure out a way to give people selection and timely delivery but do s

So then my question would be- where does Amazon store their inventory? They still have to figure out a way to give people selection and timely delivery but do so in a way that doesn't involve storing large amounts of inventory in expensive, densely-populated urban areas. The same rules apply to them as Wal-Mart in that regard. Wal-Mart could open a distribution center in Manhattan too, if the economics of it worked out. So let's supposed that this can be done profitably in New York. New York is a special case in a sense, that it is one of the most densely-populated areas on earth, and so deliveries do scale there in a way they don't elsewhere. But then what is the play in a place like Atlanta, Dallas, or Los Angeles, where driving is essential and addresses are wildly irregular?