Gian, Y. et al. 2026. Modeling Monthly Internet Data Package Expenditures Using the Numerical Method of Inverse Matrices. EduMatSains : Jurnal Pendidikan, Matematika dan Sains. 11, 2 (Oct. 2026), 387–397. DOI:https://doi.org/10.33541/edumatsains.v11i2.7790.