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Motorola Inc. will lay off 600 workers at a plant in Mexico’s state of Chihuahua because of slowing demand for its mobile phones. The cuts represent about 25% of the plant’s employees and are part of Motorola’s previously announced plans to cut 7,000 jobs.

Intuit Inc., maker of Quicken and TurboTax software, sold its online bill payment business to closely held Princeton ECom Corp. Princeton, N.J.-based Princeton ECom will pay for the sale with cash or with a 20% stake in itself, Intuit said.