Two high-profile New York Post business-section staffers are abandoning the tabloid this month. Current Sunday business editor Laura Petrecca is slated to start at USA Today on July 25, covering media and marketing. “It’s a great opportunity,” Petrecca said. “I’m thrilled.” And business reporter Erica Copulsky will be headed to the Wall Street Journal at month’s end. Copulsky declined to comment on her job switch.