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Padang N, Irnihsyah Irawan S, Atika R, Br.Manalu J, Safitri Sitorus J. EFFECT OF PRODUCTION COSTS, PROMOTIONAL COSTS, AND SALES VOLUME ON NET PROFIT IN MANUFACTURING COMPANIES. jit [Internet]. 2022 Jun. 28 [cited 2025 Jan. 11];16(3):374-81. Available from: http://ict.remorac.com/index.php/jit/article/view/1095