Abstract: A postage meter module has a printing unit, a control unit connected to the printing unit, input/output devices connected to the control unit, and memory devices connected to the control unit. A configuration for an internal cost center printout includes a pixel memory having a field and at least one memory area for accounting data into which data are loaded and converted and/or from which data are read out and converted. The conversion is a blockwise orthogonal rotation of the pixel memory field. A device for orthogonal rotation of the pixel memory field permits a block of a print image with accounting data having been electronically rotated by 90.degree. or by 270.degree. in a direction of printing to be temporarily stored in or read out from the at least one memory area of the pixel memory. A print control unit reads out print image data corresponding to the accounting data by blocks from the pixel memory.