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Calculation cost of goods sold for edutourism package servi..:

Pratiwi Ratih ; Ayu Azzahra Bilqis
https://www.e3s-conferences.org/articles/e3sconf/pdf/2023/91/e3sconf_icas2023_03022.pdf.  , 2023
Link: https://doi.org/10.1051/e3sconf/202345403022