Cost of 1 copy = 600 / 12 = ₹50. Cost of 25 copies = 25 * 50 = ₹1,250.
1 प्रति का मूल्य = 600 / 12 = ₹50। 25 प्रतियों का मूल्य = 25 * 50 = ₹1,250।