## Just think it through.

He bought 30 dozen, or 360 eggs

So the cost price was 1800/360 RS or Rs 5 per egg

But he can only sell 330 eggs.

According to the wording of the question, he wants to make a profit of 1 rupe per egg, but it doesn't say if that profit is based on the eggs bought. Since profit is usually based on cost price, ....

then he wants to make a profit of Rs 360 (1 per each egg he bought)

... or his income has to be 1800+360 = 2160

but he only sells 330 eggs, so the selling price must be

2160/330 or appr Rs 6.55

... based on my interpretation of the problem