What is Mercari's selling fee?

Excuse me, could you please clarify what Mercari's selling fee entails? I'm curious to know if there's a standard percentage charged for each item sold on the platform, or if it varies depending on the product category or the final sale price. Additionally, are there any additional fees that sellers need to be aware of, such as payment processing charges or listing fees? It would be greatly appreciated if you could provide a comprehensive breakdown of Mercari's selling fees.