An electronic cash register electrically communicates with an electronic weighing scale. An interface circuit is included in the electronic cash register for introducing weight information data from the electronic weighing scale into the electronic cash register. An abnormal condition detection system is included in the electronic cash register for detecting an abnormal condition occurring within the electronic weighing scale. The electronic cash register includes a synthetic speech sound generation system for audibly informing an operator of the abnormal condition detected by the abnormal condition detection system.