Congressional Budget Office Cost Estimate: H.R. 2647: National Defense Authorization Act for Fiscal Year 2010 [October 28, 2009] [open pdf - 63KB]
"H.R. 2647 would authorize the appropriation of about $681 billion, primarily for the fiscal year 2010 costs of the military functions of the Department of Defense (DoD) and the atomic energy activities of the Department of Energy. Those discretionary costs of implementing the act are not discussed here; this cost estimate addresses only the effects that H.R. 2647 would have on direct spending and revenues."
Congressional Budget Office: http://cbo.gov