Here's why Amazon is buying Whole Foods (AMZN, WFM)

Amazon swooped in to buy high-end grocer Whole Foods Friday, paying $13.7 billion — and a healthy 27% premium over the previous day's closing price.
So what's in it for Amazon? 
There are a couple strategic plays at work for the online-retailing giant. 
For starters, acquiring Whole Foods' 440 US stores — many of them in primo locations — will bolster the network for AmazonFresh, the company's online grocery delivery service.
"To ship efficiently groceries to con