Ex. A-1 ¶ 9(c); id. Ex. A-2 ¶ 16), such that the written contracts cover the same subject matter as the alleged unjust enrichment. See Goldstein v. CIBC World Markets corp., 776 N.Y.S.2d 12, 14 (App. Div. 1st Dept. 2004) ("A claim for unjust enrichment, or quasi contract, may not be maintained where a contract exists be