What is the application fee for BITS?

Excuse me, I was wondering if you could clarify something for me regarding the BITS application process. Specifically, what is the application fee that needs to be paid in order to submit an application to BITS? I understand that there may be various fees associated with the application and enrollment process, but I am particularly interested in knowing the cost of the initial application fee. Is it a fixed amount, or does it vary based on certain factors? Additionally, are there any payment options or deadlines that I should be aware of? Thank you for your time and assistance with this inquiry.