HD Hyundai Infracore Co. on Friday reported a first-quarter net profit of 67.6 billion won (US$48.9 million), down 39.9 percent from a year earlier.The company said in a regulatory filing that operating income for the January-March period fell 39.2 percent on-year to 92.8 billion won. Sales decreased 10.1 percent to 1.15 trillion won.Source: Yonhap News Agency