Long-run Dynamics and Short-run Adjustments: An ARDL Analysis of Khartoum Customs Department ‫حتليل‬ ‫القصري:‬ ‫ادلدى‬ ‫على‬ ‫التعديالت‬ ‫و‬ ‫الطويل‬ ‫ادلدى‬ ‫كيات‬ ‫حر‬ ARDL ‫اخلرطوم‬ ‫مجارك‬ ‫لدائرة‬