| http://www.w3.org/ns/prov#value | - to the purchase price. [0053] In an embodiment, the means for prompting is an advertisement. [0054] In an embodiment, the device for identifying is a scanner. [0055] In an embodiment, the means for prompting is a credit/debit card device. [0056] In an embodiment, the system includes a device for accepting payment for a total purchase price.
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