Amazon.com Inc.’s business sales unit was recently on track to sell $60 billion of merchandise over the course of a full year, up about 71% from 2023, evidence that the world’s largest online retailer is gaining ground in corporate sales.Amazon Business, a service that lets a range of businesses, schools and government entities place recurring or bulk orders online, reached the sales milestone in the second quarter of this year, the company said in a statement on Tuesday....