Program data and information associated with at least a consumer commodity that appears in a program of the program data are synchronously transmitted. The program data and the information associated therewith are received. The received program data is reproduced. The reproduced data is displayed on a displaying portion. Information associated with a selected one of a plurality of consumer commodities displayed on the displaying portion is extracted and displayed. A viewer can buy the selected consumer commodity at a store corresponding to the extracted information.

 
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< Automatic price display control by emulation of electronic cash register price lookup

> Apparatus and methods for handling trading data

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