TOIG should follow-up with Kiowa's management to confirm if the $124,535 noted as ineligible expenditures within the Contracts greater than or equal to $50,000, payment type are recouped or replaced by other eligible expenditures, not previously charged to CRF, that were incurred during the period of performance. Further, based on Kiowa's responsiveness to Treasury OIG's requests and its ability to provide sufficient documentation and/or replace ineligible transactions charged to CRF with valid expenditures, Treasury OIG should determine the feasibility of conducting an audit for the Contracts greater than or equal to $50,000 payment type.