Mohan purchased 50 kg of wheat at the rate of Rs. 13.40 per kg and 40 kg of wheat at the rate of Rs. 16.75 per kg. He mixed the two and sold the mixture. Approximately at what price per kg should he sell the mixture to make 25% profit? 1. Rs. 18.61 2. Rs. 18.20 3. Rs. 15.60 4. Rs. 14.80 5. Rs. 17.30