Abstract: A system includes a processor, and a display, a reader, a switch, a scale, a memory device, intake-type buttons and output-type buttons that are connected to the processor. The processor controls the display to display an identification number obtained by using the reader to read an identifier. The switch is operated to enable the processor to operate in an intake mode or an output mode. When operating in the intake (output) mode, the processor controls the display to display a symbol corresponding to one of the intake-type (output-type) buttons that is determined to be pressed, and in response to receipt of weight data from the scale, controls the display to display a value of pre-intake (post-output) weight obtained based on the weight data, and stores the value of pre-intake (post-output) weight in the memory device.