Congressional Budget Office Cost Estimate: S. 1252, Global Food Security Act of 2016 [open pdf - 23KB]
From the Summary: "S. 1252 would require the President to develop and implement a comprehensive strategy to promote global food security and agricultural development. It would authorize the appropriation of almost $3.8 billion each for 2017 and 2018 for programs to implement that strategy and to provide assistance following international disasters. Assuming appropriation of those specified amounts, CBO estimates that implementing S. 1252 would cost $7.3 billion over the 2017-2021 period (most of the remainder would be spent after 2021)."
Congressional Budget Office: http://www.cbo.gov/