Office Depot Inc. says it’s closing its Bristol, Virginia customer service center as part of its merger with Office Max Inc., laying off about 140 people. In a notice to Virginia officials, the Florida-based office products supplier says the closure will take place between May 22 and March 24, 2016. Office Depot and OfficeMax completed their $1.2 billion merger in November 2013. Then last month, Staples Inc., the nation’s largest “big box” office supply chain, announced plans to buy its second-ranked rival, Office Depot, for $6 billion. The deal is expected to close by year’s end.