Congratulations on your fast growing business! And since I come from an accounting background I'm even more happy your are starting to quantify some of your results
I set up a website that allows you to perform basic financial ratio calculations, so you can plug in your numbers and have it spit out accounting ratio results which you can use to impress bankers and VCs.
While I run it as a 'for profit' enterprise, its mission is to promote accounting and finance education...and this is where you appear to be; looking for financial knowledge.
19 Ratio Calculators are for free at www.RatioAnalysis.net
But feel free to get in contact via this forum if you have any direct questions. For what it's worth, the formulas 2 participants provided are the ones I run with personally.
Best wishes going forward and good luck with your marketing campaign,
Founder & Manager, www.RatioAnalysis.net