Apple iPhone sales like Hollywood producers tracking opening ticket sales for a blockbuster movie.A big weekend is usually a healthy predictor of consumer demand for the holiday season — not just for Apple, but for the entire consumer electronics industry.Those Apple watchers can rest easy because the company’s new iPhone 6 and iPhone 6 Plus are no bust. Apple said on Monday that it had sold 10 million units of its new and bigger iPhones over the weekend, up from the nine million iPhones it sold last year in the first weekend of sales for the previous generation of iPhones. The iPhone is still Apple’s biggest cash cow, accounting for about 70 percent of its profit. So early sales can help predict quarterly or even annual results for the company, based in Cupertino, Calif. Apple iPhone 6 Plus is very large and has the same size display as the LG G3, at 5.5 inches, but is significantly taller.Machine Learning: Review and Video: With Big New iPhones, It’s What’s Inside That CountsSEPT. 16, 2014 State of the Art: With the iPhone 6 Plus, Apple Aims for VersatilitySEPT. 17, 2014 Timothy D. Cook, Apple’s chief executive, announced the Apple Watch during an event at the Flint Center on Tuesday in Cupertino, Calif.The iPhone 6 Goes Big, as Apple Aims Small With a SmartwatchSEPT. 9, 2014 ,Now the momentum from the new iPhones’ strong opening weekend is expected to help carry Apple to record sales this holiday quarter. Maynard Um, a senior research analyst for Wells Fargo, predicts Apple will sell about 58 million iPhones in the holiday quarter, up from 51 million in that period a year ago. Toni Sacconaghi, a financial analyst for Sanford C. Bernstein, estimates Apple will sell 55 million to 60 million iPhones in the holiday season.