Chaidee, K., Somsamer, P., Thinsang, R., Muangla, W. and Wongthep, S. 2017. The Breakeven Point And Investment Return System in Fish Farming: Case Study Climbing Perch Farming in Manop Farm Mae Lao Ching Rai. RMUTL Journal of Business Administration and Liberal Arts. 5, 2 (Jun. 2017), 77–91.