That's why they're so profitable, but that's not why customers like them, at least not directly. Those things all contribute to low prices, which is one of the

That's why they're so profitable, but that's not why customers like them, at least not directly. Those things all contribute to low prices, which is one of the things he lists. All of the things you listed are benefits of extremely large scale, but Walmart wasn't born being huge. How did they get there?