Knowing how much money you'll have left after Demo Day doesn't say anything about the state of your business, or if you did it right or wrong. What you can do

Knowing how much money you'll have left after Demo Day doesn't say anything about the state of your business, or if you did it right or wrong. What you can do is estimate your runway length based on ramen profitability. That should give you a rough estimate of your best possible scenario (i.e. no other expenses). At least you'll know how much an unforeseen cost will shorten that period. That's the only thing you and your co-founders can relate to, and have to know.