Congressional Budget Office Cost Estimate: H.R. 1639, CBP Workload Staffing Model Act [open pdf - 113KB]
This is the September 5, 2019 Congressional Budget Office Cost Estimate as reported by the House Committee on Homeland Security on March 28, 2019. From the Document: "H.R. 1639 would direct the Department of Homeland Security (DHS) to develop and implement a workload staffing model and a workforce tracking system for the Border Patrol (BP) and for Customs Air and Marine Operations (AMO). The bill would require the DHS Inspector General (IG) to review the staffing model."
Congressional Budget Office: http://www.cbo.gov/