THE ROLE OF PROMOTIONAL MIX ELEMENTS IN ENHANCING COMPETITIVE ADVANTAGE: GENERAL COMPANY FOR THE MANUFACTURE OF PHARMACEUTICALS AND MEDICAL SUPPLIES IN SAMARRA CASE STUDY.: THE ROLE OF PROMOTIONAL MIX ELEMENTS IN ENHANCING COMPETITIVE ADVANTAGE: GENERAL COMPANY FOR THE MANUFACTURE OF PHARMACEUTICALS AND MEDICAL SUPPLIES IN SAMARRA CASE STUDY. IJMRCP 2019, 11 (1), 48-64.