JPS5827545B

PURPOSE:To make unnecessary the amendment of the file renewal which is processed before the interruption of the complex trade by providing a means for carrying out the reversed addition of the content of the trade which is transferred when interrupting at the time of the predetermined trade processing unit in a cash registration device. CONSTITUTION:By the data key 11-1, and the function key 11-2, the data transferred every complex trade is operation processed in the operation control circuit 22 and the operation result is written in the trade counter memory 24. The circuit 22 accumulates and adds the content of the memory 24 and writes to the remaining amount counter memory 25. When a predetermined trade processing unit of the complex trade is completed, by the key-in of the cancel key of the key 11-2 and the power source quick break and the like, the trade is interrupted, the content of the cash is set to the cash content counter of the memory 24 by the reverse addition circuit 27. Accordingly, on the way to the complex trade, even if the zero proof check is carried out, a proof error is not generated, the amount of the renewal of the file which is processed before the interruption is made unnecessary, and the processing of the complex trade becomes rapid.