How much does Coinbase charge for USDC transfer?

Could you please clarify for me the specific fees that Coinbase imposes on the transfer of USDC? I'm particularly interested in understanding whether these fees are fixed or variable, and if there are any additional costs that I should be aware of. Additionally, I'd appreciate it if you could provide me with an estimate or range of what these fees might be, as it would greatly aid in my decision-making process. Thank you in advance for your assistance.