Imelda, Vivi, and Sunarmi. “The Influence of Production Costs and Sales Volume on Operational Profit at Serasi Gorden Pringsewu: Case Study In Serasi Gorden’s Business In Pringsewu”. Enrichment : Journal of Management 13, no. 2 (June 30, 2023): 1505-1511. Accessed May 9, 2026. https://www.enrichment.iocspublisher.org/index.php/enrichment/article/view/1404.