TP profits are weird..
5% for listing the item, 10% when its sold.
You pay the listing fee from your current funds when you put the offer in.
The TP takes 10% from the actual sale price (28.90 gold) as a selling fee, if/when the item sells. So in the end, you get 26.01 gold for the sale and you pay 1.445 gold as a listing fee.