NABILLA, H.; NUGROHO, A. A.; SAPUTRA, D. The Influence of Tin Prices and Production Costs on the Net Profit Margin of PT Timah Tbk with Exchange Rate as a Moderating Variable (2018–2025). Advances in Economics & Financial Studies, [S. l.], v. 4, n. 3, p. 412–430, 2026. DOI: 10.60079/aefs.v4i3.1033. Disponível em: https://advancesinresearch.id/index.php/AEFS/article/view/1033. Acesso em: 25 aug. 2026.