1) The company gets profit of 63000 by selling 7000 bags of white cement.
the company gets loss of 3000 by selling 6000 bags of grey cement.
therefore the company gets final profit of 33000.
2)the company gets loss of 27000 by selling 5400 bags of grey cement.
the company should sell
= 3000 bags of white cement to have neither profit nor loss