Vendors’ Frequently-Asked Questions a What is a cost statement? A cost statement or cost sheet is a document that provides detailed information about the costs incurred in conducting a project, running a department, or manufacturing a product. Back to Top a What are the driver requirements? # Back to Top a What happens after I become a vendor? # Back to Top a How long will it take me to become a vendor? # Back to Top a Who is vendoring me, R&D or The Regional Center? This is the test site! Back to Top