Dow Jones Newswires reports that Yahoo’s CFO Blake Jorgensen is leaving. The announcement comes shortly after Carol Bartz took over as the company’s new chief executive, and follows a company restructuring that has also seen the departure of Marco Boerries, head of Yahoo’s connected life mobile division. Meanwhile, various reports today state that Yahoo’s efforts to fight off Microsoft last year cost US$79 million, according to the company’s Friday filing with the Securities and Exchange Commission.