The Tawe Chat 12 Total Variable 2 matun raal Net Operating income 7. Contribution margin ratio A Break even in number of units 9. Alveak even in dollar amount 10. Targer profit in number of units The Tawe Chat 12 Total Variable 2 matun raal Net Operating income 7. Contribution margin ratio A Break even in number of units 9. Alveak even in dollar amount 10. Targer profit in number of units