The 2e4 is for a standard 0.0001 ICP fee for transfer from the deposit subaccount to our fee manager + another 0.00001 ICP fee for transfer from the fee manager to the nns minting cycles canister
This fee is a generic base fee for computation and storage set arbitrarily as a method of preventing cycle drains. It is subject to change but derives from the ICP fee. It currently is:
Currently variable function call fee is based off cycles it costs to call the the exchange rate canister to get an update the price state of the markets. Future upgrades will include size of the markets and size of the Nat inputted into the function wheter borrowing, liquidating, minting, etc.