This is the Congressional Budget Office (CBO) Cost Estimate as ordered reported by the Senate Committee on Homeland Security and Governmental Affairs on July 14, 2021. From the Document: "S. 2293 would extend certain employment protections afforded under the Uniformed Services Employment and Reemployment Rights Act (USERRA) to people who are activated for temporary duty by the Federal Emergency Management Agency (FEMA) in response to disasters declared under the Robert T. Stafford Disaster Relief and Emergency Assistance Act. FEMA currently employs about 12,400 such reservists, who are deployed for duty as needed. [...] Using information from VETS [Department of Labor's Veterans' Employment and Training Service] about the rate of claim filings for the current USERRA population, CBO expects that extending employment protections to additional people would increase the number of claims, on average, by about five each year. Based on the cost to administer the VETS program, CBO estimates implementing the bill would cost less than $500,000 over the 2022-2026 period; such spending would be subject to the availability of appropriated funds."
Congressional Budget Office: http://www.cbo.gov/