Service Contract Termination for OM originated contracts

Hi Gurus,

I have a situation where we have a contract which is created from OM with duration of 955 days. There are 11 lines each line is having different schedule.

Contract header Start Date is 13-JAN-2015 and End Date is 24-AUG-2017.

Now among these 11 lines only two were invoiced of course this contract was created using customization and not through the standard process.

I need your help to understand If I terminate this contract suppose on 15-Nov-2015 and provide an override amount($50) , how the termination will be applied to the non invoiced lines.

What will be the logic to distribute the override amount among the non invoiced lines.