gs to PDF for first copy only

regarding gs to produce pdf just as "-dNOPAUSE -sDEVICE=pdfwrite "-sOutputFile=C:\Archive\?SN?.pdf" -dBATCH "?PF?" ...if the print job contains of 10 copies, how can we only product 1 copy of pdf? thanks!

Unfortunately we have no control over the content of the job, we can't change the number of copies.