A merchant on selling rice earns a profit of Rs 10 per bag of basmati rice sold and a loss of Rs 5 per bag of non-basmati rice. (i) He sells 3,000 bags of basmati rice and 5,000 bags of non-basmati rice in a month.What is his profit or loss in a month? (ii) What is the number of basmati rice bags he must sell to have neither profit nor loss,if the number of bags of non-basmati rice sold is 6,400 .