Display both charges payable and total charges owed.
At present the main page of a user's account displays the total amount of charges payable, but does not show a total for charges that are still accruing - e.g. fines on books that are currently overdue.
This would be useful information to see, and could be displayed so:
Total Owed (Amount Payable): £10.00 (£5.00)
Charges Payable: £ 5.00
Charges Pending: £ 5.00