Packages move down a conveyor system to the proper shipping area at the new Amazon Fulfillment Center in Sacramento, Calif., on Feb. 9. Amazon’s profits, announced on Thursday, roughly tripled what analysts had been expecting.

Packages move down a conveyor system to the proper shipping area at the new Amazon Fulfillment Center in Sacramento, Calif., on Feb. 9. Amazon’s profits, announced on Thursday, roughly tripled what analysts had been expecting.