Not the fiscal cliff once feared, but a roller coaster: That’s how some analysts have described sequestration’s impact on federal budgets. Some agencies are riding high; they’ve canceled furlough days after finding they have more money than expected. But some are rushing to award big contracts before the spare cash disappears at the end of the fiscal year. Kevin Brancato, a defense analyst at Bloomberg Government, explains how much more he expects the government will spend between now and the end of the fiscal year.