SK Networks Co. on Monday reported its first-quarter net income of 7.3 billion won (US$5.3 million), up 36.2 percent from a year earlier.The company said in a regulatory filing that operating income for the January-March period rose 1.5 percent on-year to 62.4 billion won. Sales increased 3.6 percent to 2.47 trillion won.Source: Yonhap News Agency