CLC 139, Acquisition of Commercial Items was created in response to the FY18 NDAA. The continuous learning module comprises over 30 separate videos, text content, and knowledge reviews. Each video embedded in CLC 139 has been uploaded to the CON Media Page for easy access by the acquisition workforce. In this video, we explain the requirement to document the price reasonableness of commercial items under FAR 12.209 and FAR 15.406-3. In addition, we discuss information that should be included within the documentation.