To improve workability when each commodity relative information card is sorted according to a group after printing in the case of printing to form a matrix of a plurality of rows and a plurality of columns by gathering a plurality of commodity relative information cards in a predetermined sheet.

Individual printing data for printing the plurality of the commodity relative information cards are disposed for layout on a new row, a new line or a new page by partitions of groups along the row or the line for forming the matrix in a predetermined sequence of the plurality of the groups.