Treasury OIG should request DC to provide support for replacement expenses, not previously charged, that were eligible during the CRF period of performance for the $8,290 of ineligible costs charge to the Grants greater than or equal to $50,000 payment type. If support is not provided, Treasury OIG should recoup the funds. Based on DC management's responsiveness to Treasury OIG's requests and management's ability to provide sufficient documentation, Treasury OIG should determine the feasibility of conducting an audit for Grants greater than or equal to $50,000 payment type.