We hold that Commerce has failed to adequately explain why it has interpreted the phrase "foreign like product" differently in 19 U.S.C. §§ 1677b(a)(1) and 1677(e). We accordingly vacate the decisions of the Court of International Trade in FAG Kugelfischer v. United States, No. 99-08-00465, 2000 WL 963368 (Ct. Int'l Trade July 7, 2000), and SKF USA Inc. v. United States, No. 98-07-02540, 2000 WL 726941 (Ct. Int'l Trade June 1, 2000) and remand for further proceedings. STATUTORY BACKGROUND