"I'm really into jeans but it blows my mind to see the price fluctuate between the different types of jeans," says Julia in Rachael's audience. "I want to know if it's worth it to spend the money considering I don't see a difference?" Click on the video for fashion designer Isaac Mizrahi's answer, and get more of his tips in his new book @[*How to Have Style*](http://www.isaacmizrahiny.com).