Nasution, Nurliana, Dadang Rukmana Sitompul, and Walhidayat Walhidayat. 2023. “Application of Sales Forecasting Using The Least Square Method in Web-Based Information Systems”. JURNAL TEKNOLOGI DAN OPEN SOURCE 6 (1), 11 - 22. https://doi.org/10.36378/jtos.v6i1.2580.