Fees listed on university website is different that what is listed on I20

Recently I got an admit from a university whose fees listed on there website is $8000.
But in I20 it is mentioned $14000. It is true?
I got a mail from university that they are sending the I20 I am having doubt as the admission packet was delivered to the consultancy as there adress was mentioned on residence address and they handed over that to me. Are there chances that they changed the fees on i20?

Directly contact the bursar office of the university and check with the actual fees for international student per course/credit. Once you have it, then check with the international admissions office as to how they came up with $14k number ? They will explain you the details.