https://finance.yahoo.com/news/amazon-tests-cashierless-technology-bigger-235700756.html > A spokeswoman for Amazon declined to comment. Whole Foods declined to comment. > The cashierless system is already in use at seven Amazon Go convenience stores in Seattle, Chicago and San Francisco. The company plans to build more of these small stores, according to one of the people familiar with the matter. Each is typically less than 2,500 square feet and sells a range of drinks, prepared foods and groceries.