Juan borrows a total of $85,000 to pay for medical school. He borrows part of the money from the school whereby he will pay 3.6% simple interest. He borrows the rest of the money through a government grant that will charge him 6.8% interest. In both cases, he is not required to pay off the principal or interest during his 3 years of medical school. However, at the end of 3 years, he will owe a total of $11,826 for the interest from both loans. How much did he borrow from each source?