A retailer measures so many things: the average ticket sale for each customer that comes through, the sales per square foot of the store, the penetration of particular product brands, and more. In the...A retailer measures so many things: the average ticket sale for each customer that comes through, the sales per square foot of the store, the penetration of particular product brands, and more. In the last section, we talked about the different kinds of store layouts and the products that are best displayed in them. Now we’re going to talk about traffic flow in a store, how ignoring our four customer behaviors can make or break a sale.