How Many Days Can I Still Stay in Business?

The faster amazon grows and the faster walmart grows, the better their cash flow is. Most of you can have to pay the money before you get it. When i was a struggling ougpuner, i only kept track of one thing, how many days can i still stay in business? So if the number was getting too low, i would say, i have to go do a project that's going to pay. I have to figure out how to sell a 50 thousand dollar book instead of spending all my time on a 500 million dollar book. And when there was enough of a cushion, i could say, now i can invest time in personal growth or the like.