Who do you think sells more per retail square foot? Pricey Tiffany & Co. with their $100,000 baubles or Apple retail stores? If you said Tiffany, you would be wrong. Apple retail stores sell annually an amazing $4,406/square foot. Tiffany & Co., the most successful large jewelry retailer, has annual sales of $3,070 per square foot. Those Apple salespeople can really sell. Here’s what you can learn from their retail sales process to boost your sales.