Less than a week after a report from Bloomberg Businessweek outlined how Steve Jobs' strict requirements for "fit and finish" at the company's upcoming Norman Foster-designed Apple Campus 2 in Cupertino have seen the cost of the massive project balloon to $5 billion, Marketing reports [via Pocket-lint] that Foster's firm has been tapped to work on retail store projects for Apple.Sources close to the project said Foster + Partners, which has designed buildings including the McLaren Technology Centre and Hearst Tower in New York, is helping Apple on the retail store design brief.