Dear aspirant,
If you belong to GEN/GENEWS/OBCNCL category then you have to pay Rs 36,500 or if you belong to SC/ST/PwD category then you have to pay Rs 16,500. if you know more information about the CSAB special round then you have to check the official website of it. here is the link.

Https://csab.nic.in/cms/Public/Home.aspx

Once you can go through this link and check the business rules. hope it helps you.

Thank you.