| 摘要 |
The invention provides an incentive based purchasing system in which customers purchase items from a merchant at one or more checkout terminals, the system comprising a data memory in which is stored a transaction database comprising one or more transaction records, each transaction record comprising a customer identifier, a merchant identifier, and a transaction total; and a prize calculator arranged to calculate the percentage chance of a customer winning a prize when purchasing items from a merchant based on transaction records retrieved from the transaction database involving the customer and the merchant. The invention also provides a related associated method and computer program.
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