Abstract: A gestural checkout system includes a sensor-equipped server programmed with a gestural context application that authenticates a customer's identity upon entry to a retail store. The sensors include cameras. The sensors are identify products and detect gestures of the customer indicating a purchase decisions. Gestures include product pick-up, product movement and product-commit-to-container actions. For bulk items, an Implicit Gestural Scale communicates product identity and volumetric data wirelessly to the implicit gestural checkout. Recognition of shopper locomotion, past a line of demarcation near the exit, automatically authorizes electronic payment.