Dell tonight reported mixed results for its latest quarter. Despite shipping 29 percent more PCs to home users between November and January versus the same timeframe a year ago, the Texas-based company's net profit ultimately dropped 5 percent as it focused on selling less expensive PCs. Its gross margin dropped to a relatively slim 16.6 percent as the holiday-related sales spike pushed it to sell 2 million more computers without as much profit as in the past.