First-time shoppers at Seattle-based Amazon Go may feel as though they are stealing. That’s because the 1,800 square-foot grocery store, which opened its doors to the public on January 22, has no cashiers or even checkout counters. Instead, as the name indicates, customers merely grab what they need and go! But before you start celebrating, the goods are not free — the cost of the purchase(s) is/are calculated electronically using Amazon Inc.’s proprietary “Just Walk Out” technology.