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Simanjuntak, L. F.; Siregar, J. U.; Wahyudi, T. A.; KD, P. E. .; Aritonang, R. G. B. .; sitorus, B. Analysis of Coffee MSME Production Cost Efficiency Using the Leontief Matrix Model Based on Monthly Production Data at Sumatra Roastery in Medan City. OJES 2025, 5 (2), 124-132. https://doi.org/10.61730/vegjaa70.