How much is the annual fee for ENS domain?

Excuse me, I have a question regarding the ENS domain annual fee. Could you please tell me how much the annual fee is for maintaining an ENS domain? I'm considering purchasing one but want to ensure I understand all the associated costs. Is the fee a fixed amount or does it vary based on certain factors? Also, do you have any information on how the fee is calculated or how often it needs to be paid? Thank you for your assistance in clarifying this matter.