ToplineA coalition of labor groups sent a letter to the Securities and Exchange Commission (SEC) Friday, claiming that Starbucks has failed to disclose to shareholders $240 million in costs and liabilities for “anti-union activity” and unpaid wages, the latest salvo in the fight between organizing employees and the coffee giant.FILE - This Thursday, Jan. 12, 2017, file photo shows a Starbucks logo sign in the window of one of ... [+] the chain's cafes in Pittsburgh. (AP Photo/Gene J. Puskar, File)Copyright ...