Atmaja, K.J. and Ida Bagus Gede Anandita 2021. Sales Forecasting System Using Single Exponential Smoothing. Jurnal Mantik. 4, 4 (Feb. 2021), 2552-2557. DOI:https://doi.org/10.35335/mantik.Vol4.2021.1207.pp2552-2557.