Imelda, Vivi, and Sunarmi. 2023. “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 (2), 1505-11. https://doi.org/10.35335/enrichment.v13i2.1404.