An Integrated Inventory Model for Distributor - Retailer Considering Transportation, Loading-Unloading, and Carbon TaxRahma Faza Anggita, Wakhid Ahmad Jauhari and Cucuk Nur RosyidiE3S Web of Conf., 465 (2023) 02010DOI: https://doi.org/10.1051/e3sconf/202346502010