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1. At a computer system, the computer system including one or more processors and system memory, the computer system maintaining a store layout for a store, the store layout indicating the location of items within the store, the computer system able to communicate with mobile devices in the store via a wireless connection, a method for approximating the location of a customer within the store, the method comprising;
forming a wireless connection with a customer mobile device in the store, the customer mobile device maintaining a shopping list for a customer, the shopping list including a list of items of interest to the customer; receiving a notification from the customer mobile device, the notification indicating that an item on the shopping list has been checked off of the shopping list; in response to receiving the notification, referring to the store layout to identify the location of the checked off item within the store; and inferring that the customer was near the location of the checked off item when the item was checked off of the shopping list.
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