My Mulebuy Spreadsheet Saved Me $3K Last Month – Here’s How I Built It Okay, confession time: I used to be that person who’d impulse-buy a $200 cashmere sweater because “it was on sale.” Fast forward to last month’s credit card statement staring back at me with judgmental red numbers, and I knew something had to change. Enter what my friends now call “The Spreadsheet That Changed Everything” – my custom mulebuy spreadsheet. Let me paint the scene: It’s 2 AM, I’m doomscrolling through luxury resale sites, and that Saint Laurent bag is whispering sweet nothings to my sleep-deprived brain. Before The Spreadsheet, I would’ve clicked “buy now” and dealt…