LX International said Wednesday its first-quarter operating profit nearly doubled from the previous quarter, as stronger commodity prices and a recovery in trading lifted earnings. The company reported revenue of 4.21 trillion won ($2.9 billion) and operating profit of 108.9 billion won for the January-March period, according to a regulatory filing. Revenue rose 4 percent from a year earlier, supported by higher output and sales at key assets including its AKP nickel mine and palm plantations in