Ethereum transactions have an quantity of fuel that’s used for computation. A normal Ether ship is all the time 21,000 fuel, the extra complicated the transaction the extra fuel it’s going to use. To get the fee in $USD, you first must multiply the fuel worth * precise fuel. In your picture the fuel worth is 131 Gwei, so a easy ether ship would price 131*10-9*21,000, which supplies you a closing end in ETH which is then transformed to $USD.
The fuel for promoting on Opensea might differ and I do not know how a lot fuel it requires, so I can not calculate that within the instance