Navy Constellation (FFG-62) Class Frigate (Previously FFG[X]) Program: Background and Issues for Congress [Updated February 11, 2021] [open pdf - 3MB]
From the Introduction: "This report provides background information and discusses potential issues for Congress regarding the Navy's Constellation (FFG-62) class frigate program, previously known as the FFG(X) program. The FFG-62 class program is a program to procure a new class of 20 guided-missile frigates (FFGs). Congress funded the procurement of the first FFG-62 class ship in FY2020 at a cost of $1,281.2 million (i.e., about $1.3 billion), and the second FFG-62 class ship in FY2021 at a cost of $1,053.1 million (i.e., about $1.1 billion). The Navy's FY2021 budget submission estimated that subsequent ships in the class will cost roughly $940 million each in then-year dollars."
CRS Report for Congress, R44972
Congressional Research Service: https://crsreports.congress.gov/