Does Gumroad take a fee?

Are there any fees associated with using Gumroad for transactions? I'm interested in using the platform to sell my digital products, but I want to make sure I understand all the costs involved. Could you please clarify if Gumroad takes a percentage of each sale or if there are any other fees I should be aware of? Additionally, is there a way to minimize these fees or take advantage of any discounts or promotions that may be available? Thank you for your time and assistance in answering these questions.