I would like to know how to calculate seller commission on eBay? I am dropshipping and still haven't learned how to do it. I would like to understand what it is formed from?

Seller commission on eBay for dropshippers is calculated based on several criteria, but I don't think it makes sense to calculate it yourself when there are plenty of tools that help you do it automatically. For example, here's a quick and easy eBay fees calculator https://easync.io/ebay-fees-calculator/.