Not able to setup change order approval heirarchy in the below logic in oracle fusion

Summary:

Not able to setup change order approval heirarchy in the below logic in oracle fusion

New Logic required = The PO Change Order workflow reflect the accumulated total order value — meaning the original PO value + all previously approved change values + the current change order value.

Can we create approval based on the above logic from manage purchasing document approval hierarchy? as there is only and operator and we are not able to setup the above logic

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