Satyam took a loan from IDIDI Bank for his 2 years course of MBA at IMD. He took the loan of Rs. 6 lakh such that he would be charged at 8% per annum at CI during his course and at 10% CI after the completion of course. He returned half of the amount which he had to pay on the completion of his studies and remaining after 2 years. What is the total amount returned by Satyam?