By Bansari Mayur Kamdar and Noel Randewich (Reuters) – Wall Street tumbled on Friday at the end of a volatile week, as Amazon slumped following a gloomy quarterly report, and as the biggest surge in monthly inflation since 2005 spooked investors already worried about rising interest rates. Amazon.com Inc tumbled 14%, on track for its steepest one-day drop since 2006 and leaving the widely-held stock near two-year lows. Late on Thursday, the e-commerce giant delivered a disappointing quarter and outlook, swamped by higher costs to run its warehouses and deliver packages. Apple Inc, the world’s …