This week I talk to business owners who know their business inside and out. When we turn to the topic of their numbers, you can get two vastly different responses. Two owners could own their business for 20+ years and have had successes and failures along the way. They know their numbers inside and out: every margin on everything sold, all their costs like the back of their hand. The other has extreme insecurity about numbers. They couldn't tell you, and even if they could see them in front...