This was just dropped in my lap, so I will clarify. Contractor A was awarded an IDIQ contract for minimum quantities. They billed for actual quantities. Since they hadn't received the minimum quantities, at the end of the contract they billed the difference. This work covered 5 facilities as stated in the SOW. One facility thought their contractor, Contractor B would do it faster, cheaper so they had the contractor that was already working in the facility assume a large portion of Contractor A's work. The contract did not have a requirements clause stated in it, but appears to be a requirements contract. Now, Contractor A has submitted invoices for balance of work and Mgmt directed last CO to reject payment and request Contractor A submit a REA. I am looking for the correct path forward.