Symbiosis National Aptitude Test SNAP 2012 Paper

A manufacturer of a certain item can sell all he can produce at the selling price of ₹ 60 each. It costs him ₹ 40 in materials and labour to produce each item and he has overhead expenses of ₹ 3,000 per week in order to operate that plant.
The number of units he should produce and sell in order to make a profit of at least ₹ 1,000 per week is