A shopkeeper bought 80 kgs of sugar at the rate of Rs. 13.50 per kg. He mixed it with 120 kg of sugar costing Rs. 16 per kg. In order to make a profit of 20% he must sell the mixture at

• A. Rs.18 per kg
• B. Rs.17 per kg
• C. Rs.16.40 per kg
• D. Rs. 15 per kg