1. A system for facilitating the management of sales opportunities for purchasable items offered to customers, the system comprising: a processing element capable of proposing a plurality of purchasable items to a plurality of customers for selection by the customers, said processing element being capable of receiving and storing data representing at least one purchasable item selected by each customer and data representing at least one sales variable for each customer, and wherein said processing element is further capable of comparing the at least one sales variable for at least two customers.