sansong, panthip. 2020. “Break-Even Point and Margin of Safety Analysis In Sugarcane Cultivation of Farmers With the Introduction of Agricultural Machinery to Be Used in Nakhon Sawan Province”. Journal of Research and Development Institute Rajabhat Maha Sarakham University 7 (2):179-92. https://so03.tci-thaijo.org/index.php/rdirmu/article/view/247093.