...Hotel Fire Litigation, 142 F.R.D. 41, 46 (D.P.R. 1992). The Supreme Court has acknowledged that excusable neglect is a fairly flexible concept that encompasses inadvertence, mistake, carelessness, as well as intervening circumstances beyond the party's control. Pioneer Inv. Serv. Co. v. Brunswick Assocs. Ltd. P'ship, 507 U.S. 380, 388, 113 S. Ct. 1489, 123 L. Ed. 2d 74 (1993). The First Circuit set forth examples of...Court's Mandate dismissing the appeal. The Court holds that submission of Plaintiff's Bill of Costs is not untimely because Plaintiff has shown good cause and excusable neglect as to why Plaintiff..."excusable...