(d ) Let the number of units produced per week be x. Selling price of all units = ₹ 60x ∴ CP of all units = ₹ 40x + 3000 According to the question, 40x + 3000 + 1000 = 60x ⇒ 20x = 4000 ∴ x = 200 Hence, he should produce at least 200 units to make a profit of ₹ 2000 per week