This is the Congressional Budget Office (CBO) Cost Estimate as ordered reported by the Senate Committee on Energy and Natural Resources on December 17, 2020. From the Document: "S. 389 would authorize the Society of the First Infantry Division, a nonprofit organization, to modify the First Division Monument located on federal land in President's Park in Washington, D.C. Under the bill, the Department of the Army would provide a list of names of the soldiers killed in recent military operations that the Society of the First Infantry Division would add to commemorative plaques and stone plinths at the monument. CBO estimates that implementing S. 389 would have an insignificant cost over the 2020-2024 period; any spending would be subject to the availability of appropriated funds."
Congressional Budget Office: http://www.cbo.gov/