Hi Joe,
Why don't you use the Cust. Disputed amount field (UDMCASEATTR00-FIN_CUSTDISP_AMT). But checking this field will not be enough because a dispute case can have both Customer disputed amount and Disputed amount.
So you can go with the logic if Cust. Disputed amount is not zero and Disputed amount is zero. Those dispute cases can be cleared. I am not sure after this what will be your criteria to decide which Cust. Disputes to close.
Thanks and Regards,
Prateek