Is the Mulebuy Spreadsheet the Ultimate Shopping Hack for 2026? I Tested It. Okay, let’s be real for a sec. I’ve been deep in the trenches of online shopping for years, and I’ve tried every trick in the book to save money without sacrificing style. But when I first heard about the mulebuy spreadsheet from a friend who’s a serious deal-hunter, I was skeptical. A spreadsheet? For shopping? That sounds like something your dad would use to track his golf scores. But then I saw her haul, and my jaw hit the floor. She got a designer bag for 70% off. So I had to try it myself. Fast forward…