PURPOSE: To simply and speedily select a control function for a slip file out of a wide variation by setting the largest number of persons and the largest number of registered items for each slip file, and the issue quantities of slip files handled by the register on the register.

CONSTITUTION: When respective keys on a keyboard 1-1 are operated, corresponding key codes are generated and supplied to an arithmetic controller 1-3. A memory 1-5 has a control information setting file 2-2, an article item setting file 2-3, a sales totalization data file 2-4, and a slip file area 2-5 internally as a device which stores setting data required for a registering and a totalizing processing and data generated accompanying the registering process and totalizing process. In the control information setting file 2-2, a slip file constituent element setting area is secured and the number of items registered in each slip file and the issue quantity of the slip files that the register can handle are set.