Sabrina Sri Ramadini and Renny Maisyarah 2025. The Influence of Operational Costs and Promotion Costs on Activity Based Management at PT Singa Asia Perkasa Utama. International Journal of Integrative Sciences. 4, 7 (Jul. 2025), 1781–1792. DOI:https://doi.org/10.55927/ijis.v4i7.490.