Did the same thing for a year and a half until an old pipefitter caught it. I kept blaming the field guys for bad fits and they were probably cussing my name the whole time. Do you redo the iso or just hand the welder a sharpie and let him mark it up?

The part about a category you "secretly avoid looking at" is real, but here is the thing nobody talks about. That $412 is not really about coffee, it is about the fact that you stopped noticing the habit the second it became normal. Once something is part of your morning, your brain files it under "just getting through the day" and stops counting it as spending. So the sheet did not find a coffee problem, it found a blind spot you built on purpose. That is why it hit you in the stomach, because you were not mad about the money, you were mad that you hid it from yourself without even trying. Try this instead of cutting the coffee: put that category on your main tab where you have to see it every time you open the file.