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Now Playing: 03-20-12 Marketplace Mid-day Update

The company that makes Apple products in China, Foxconn, is pledging to improve working conditions at its factories, saying it'll hike pay and limit work hours after an investigation found the firm was regularly violating labor rules. Here in this country, many jobs are being replaced by machines, and Economy 4.0's David Brancaccio is currently driving 3,200 miles across the country without interacting with humans. The amount of outstanding student loan debt in this country has reached $1 trillion, and Democratic Senator Dick Durbin of Illinois is trying to address this issue at the federal level. And the Master's tournament tees off next week at the exclusive Augusta National Golf Club in Georgia.