Epi Handayani. “The Influence of Production Costs and Sales Volume on Company Profits at PT Solusi Bangun Indonesia (Case Study on the Indonesian Stock Exchange 2015-2022)”. Formosa Journal of Social Sciences (FJSS), vol. 3, no. 2, June 2024, pp. 175-86, doi:10.55927/fjss.v3i2.9651.