How much does MetaMask charge for swaps?

I'm curious about the fees associated with MetaMask swaps. Could you elaborate on how much MetaMask charges for swapping one cryptocurrency for another? Are there any hidden costs or fees that users should be aware of? Additionally, does the fee vary depending on the amount being swapped or the type of cryptocurrency involved? It would be great if you could provide a comprehensive breakdown of the costs involved in using MetaMask for swapping purposes.