Honestly the "tenth on the fixture" thing is exactly like people who clean their whole house before guests come but forget the bathroom trash. You nailed the exact size of the problem, it's never the fancy stuff. Tbh a chip under the part will get you every single time no matter how pretty your indicator sweep looks.

Why do stores make it so hard to figure out what stuff actually costs? The bag being more than double the bulk bin is wild when you think about it, you're paying extra for the plastic and the label. I've noticed the same thing with spices too, those little jars are a total rip off compared to filling your own bag, and honestly even stuff like nuts and oatmeal. Once you start checking the unit price on the shelf tag instead of just grabbing what looks normal, it's kind of eye opening how often the "convenient" version is the one getting you. The whole thing feels like a pattern where we just trust the packaged stuff is cheaper without ever doing the math.