Original: Curtis was released to significant commercial success, selling 691,000 copies in its first week on the Billboard 200, the highest sales week for an East Coast album since Jay-Z's Kingdom Come debuted with 680,000 copies sold several months earlier.
Simplified: Curtis was released and sold 691,000 copies in its first week on the Billboard 200. It sold the most copies in one week for an East Coast album since Jay-Z's Kingdom Come sold 680,000 copies sold.