He miswrite the amount of the payment he received on the end of auction. In the raw version, he get 2.25 Billion then deducted by 1 Billion which left 1.25 Billion, but he forget the amount of Fairy cost, so he write 2.15 Billion instead.
Still don't like the idea of Touru marrying the Roane's daughter.
Still horrible slave trope. Can't make sense of it at all. Why the heck is Kaede ok to call him master and not Frau?
Writer dirping over translation with his mathing.