A manufacturer of a certain item can sell all items he can produce at the selling price of Rs. 60 each. It costs him Rs. 40 in a material and labour to produce each item and he has overhead expenses of Rs. 3000 per week to operate that plant. The number of units he should produce and sell in order to make a profit of at least Rs. 1,000 per week is-

• 200 units
  If number of items sold/week=n
  Weekly cost=(40n+3000), Selling price=60n
  In order to make profit of Rs. 1000, (40n+3000)+1000=60n, 20n=4000, n=200
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