Systems and methods are provided for assisting a customer with purchasing a merchandise item in a store. Assisting the customer may include determining a location of a customer (i.e., customer device) in the store, identifying merchandise items located adjacent to the customer, receiving selection of a merchandise item for purchase from the identified merchandise items, receiving payment authorization information for the purchase, and initiating delivery of the merchandise item to the customer. Additionally, systems and methods are provided for inventory management in a store. Consistent with certain embodiments, computer-implemented systems and methods are provided for selecting a sensor, receiving a sensor identifier and a position of the sensor, receiving merchandise identifiers for merchandise items located near the sensor, and storing the merchandise identifiers in association with the sensor identifier. Additionally, systems and methods are provided for providing directions to a customer for locating a selected merchandise item in the store.