Cost Agent Cost Agent is a tool that enables PJM Market Sellers, including their marketing agents, to submit and review unit-specific variable operating and maintenance (VOM) costs. Registered users have the ability to submit VOM data, track the status of VOM submissions, and review current and historical approved adders. Production: Sign In Train Environment: Sign In Date 2024 VOM Education Session: Process PDF | Streaming WEB 4.25.2024 Cost Agent User Guide PDF 4.11.2024