Treasury OIG request Oklahoma County management to provide support for replacement expenses, not previously charged, that were eligible during the CRF period of performance for the $326,664 of ineligible costs charged to the Transfers greater than or equal to $50,000 payment type. If support is not provided, Treasury OIG should recoup the funds. Further, based on Oklahoma County's responsiveness to Treasury OIG's requests and management's ability to provide sufficient documentation and/or replace unsupported and ineligible transactions charged to CRF with valid expenditures, Castro recommends that Treasury OIG determine the feasibility of conducting an audit for the Transfers greater than or equal to $50,000, Aggregate Reporting less than $50,000, and Aggregate Payments to Individuals payment types.