How much does it cost to register an ENS domain?

Could you please clarify for me the cost involved in registering an ENS domain? I'm interested in acquiring one but I'm not entirely sure about the financial commitment. Is the price fixed or does it vary based on certain factors? Also, are there any additional fees or ongoing costs that I should be aware of? It would be helpful if you could provide a ballpark figure or a range so that I can budget accordingly. Thank you for your assistance in this matter.