I am a student of Chongqing University of Technology, and I also applied for the self-taught examination in our school. First of all, different majors require different fees. Then, you'd better try to pass every exam, but if you don't, you have to pay a make-up exam fee, plus the information you want to buy, which is also a big expense. As far as I'm concerned, the total cost is about 6000 yuan. If you want to take the exam, you can go to the school website first to find out. I hope I can help you.