The following is the Congressional Budget Office report, An Analysis of the Navy’s Fiscal Year 2019 Shipbuilding Plan.
From the report
The Department of Defense (DoD) submitted the Navy’s 2019 shipbuilding plan, which covers fiscal years 2019 to 2048, to the Congress in February 2018. The average annual cost of carrying out that plan over the next 30 years would be about $28.9 billion in 2018 dollars, the Congressional Budget Office estimates. The Navy’s 2019 shipbuilding plan differs...
https://news.usni.org/2018/10/18/cbo-analysis-u-s-navy-fy-2019-shipbuilding-plan