Hyundai Mobis Co., Korea’s biggest auto-parts maker, is investing $60 million to build a factory in Georgia that will supply Kia Motors Corp.’s first U.S. auto-assembly plant, the state said. Hyundai Mobis will employ 600 people in West Point when its factory opens in 2010, Georgia Governor Sonny Perdue said in an e-mailed statement yesterday. Kia plans to make as many as 300,000 vehicles a year at its $1 billion plant, also in West Point, that opens in 2009. The Georgia factory would be third in the U.S. for Hyundai Mobis, which now makes parts in Alabama and Ohio.