Tobing, D.N.L. 2022. Indihome Product Sales Forecasting with the Double Moving Average and Double Exponential Smoothing Methods on PT. Telkom Witel Sumut Pematang Siantar. Formosa Journal of Science and Technology . 1, 8 (Dec. 2022), 1201–1222. DOI:https://doi.org/10.55927/fjst.v1i8.2281.