| 摘要 |
Using the coupons stored in an electronic device, a user can reduce the cost of their purchases during a sales event conducted with the point-of-sale (POS) device. The user can download coupons and rebate information to the electronic device from a sales portal, or they can be sent to the electronic device by the sales portal, such coupons are used in sales transactions with POS computers or even in online sales transactions. A sales client in the electronic device facilitates successful completion of interrupted sales transactions.
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