The document details the judgment of the U.S. Court of Appeals for the Third Circuit regarding a case where the Energy Corporation of America (ECA) appealed a jury's verdict that found it had improperly deducted transportation and marketing costs from mineral royalties owed to a class of Pennsylvania landowners. The court affirmed the district court's ruling, supporting the jury's conclusion that ECA breached the lease agreements by making improper deductions, and denied ECA's request for a new trial based on the admissibility of expert testimony. The appellate court found that sufficient evidence existed to support the jury's verdict in favor of the landowners.