what is coinbase fee for selling

Okay, I will write an article about the fees for selling Bitcoin and Ethereum on Coinbase. The article will be 500 words or more and include a clear title, which will be in the first line of the content. The article will cover key concepts and principles, provide examples or applications to support the opinions, and use fluent language. I will ensure that the article is not repetitive and that all key concepts are covered.