If the purchases made during the year were Rs. 60,000, the balance of stock in trade at the beginning and at the end of the year were Rs. 12,000 and Rs. 9,000 respectively and the gross profit on sales was 1/5th, when which one of the following represents the figure of gross profit for the year ? (A) Rs. 15,750 (B) Rs. 14,000 (C) Rs. 12,500 (D) Rs. 17,250