Suits for accounts.

(1) In a suit for accounts, fee shall be computed on the amount estimated in the plaint. (2) Where the amount payable to the plaintiff as ascertained in the suit is in excess of the amount as estimated in the plaint, no decree directing payment of the amount as so ascertained shall be passed until the difference between the fee actually paid and the fee that would have been payable had the suit comprised the whole of the amount so ascertained, is paid.