How much will the upcoming Royal Wedding cost the British Economy?

Good news for the British: They'll be getting an extra day off to celebrate the royal wedding next year. The bad news: That extra day off will cost the country $7.9 billion, according to calculations by the Telegraph. Business groups expect the day off to result in $9.48 billion in lost productivity, which will be offset by some $1.6 billion in extra spending by tourists and in sales of memorabilia.