The more examples I see the more I'm convinced that a big cause of failing businesses is just failure to do math. I've seen so many businesses struggle because they failed to do the simple thing: concentrate on profit margin and focus on maximizing it.
I work for a plumbing/heating/HVAC distributor and the absolute biggest number they look at is margin. Real simple shit, especially when you use a system that always shows the GP% on every screen.
