A shopping system is provided having a first interface surface having first coded data identifying a user of the first interface surface, a shopping receptacle having a shopping receptacle identity, and a sensing device. The sensing device is configured to sense the first coded data, sense second coded data of a second interface surface of a product item, generate indicating data from the sensed first and second coded data, and transfer the shopping receptacle identity and indicating data to a computer system. The second coded data is indicative of an identity of the product item and of a plurality of locations of the second interface surface. The indicating data is indicative of the user and product item identities and at least one of a position and orientation of the second coded data and a position and orientation of the sensing device relative to the second interface surface.