Halimatus Fatmasari, N. .; Zuhro, D.; Sutini, S.; Rachmawati, A.; Daeng GS, A. DIFFERENTIAL COST ANALYSIS IN THE DECISION TO MAINTAIN OR DISCONTINUE A PRODUCT. (Case Study at PT. Modern Keramik Jaya in Surabaya). jomss 2026, 4, 1440-1457.