Congressional Budget Office Cost Estimate: H.R. 3246, Traveling Parents Screening Consistency Act of 2019 [open pdf - 30KB]
From the Document: "H.R. 3246 would require the Government Accountability Office (GAO) to review the Transportation Security Administration's implementation of the Bottles and Breastfeeding Equipment Screening Act. Using information about the cost of other GAO studies, CBO [Congressional Budget Office] estimates that the review would cost less than $500,000."
Congressional Budget Office: http://www.cbo.gov/