COMMODITY SALE DATA PROCESSING DEVICE

摘要

A commodity sale data processing device (1) comprises an electronic tag data memory (42) and commodity item buffer (41). A CPU (11) judges whether or not the same data as electronic tag data read by an electronic tag reader (2) is stored in the electronic tag data memory (42). If the same data is stored therein, the electronic tag data read from the electronic tag is discarded. If not, the electronic tag data read from the electronic tag is added to the electronic tag data memory (42), and commodity sale data is acquired on the basis of the read electronic tag data and added to the commodity item buffer (41). When registration completion of one business transaction is declared, completion processing of the one business transaction is performed according to the commodity sale data in the commodity item buffer (41). After the completion processing, the commodity item buffer (41) is cleared.