Loss incurred while selling 1 bag of grey cement = −Rs 5
Loss incurred while selling 6400 bags of grey cement = (−5) × 6400
= −32000
Let the number of bags of white cement to be sold be x.
Profit earned while selling 1 bag of white cement = Rs 8
Profit earned while selling x bags of white cement = x × 8
= 8x
In condition of no profit no loss,
Profit earned + Loss incurred = 0
8x + (−32000) = 0
8x = 32000
x =
x = 4000
Therefore, 4000 bags of white cement must be sold.
Regards