Some of you are making it more complicated than it is. Just tell me trades that add up to the full amount of panic dollars you have. Don't worry about deducting transaction fees in advance.
Just be mindful that the more trades you do the more it will cost when the match is played. You earn return on the full amount you invest in each player, the transaction fee is only deducted after the next match, i.e. from your return or from the investment if your player did not play.