Finance
2 essays on this topic.
Unit Economics in Plain English: CAC, LTV, Payback and Margin
What one customer costs, earns and keeps for you. CAC, LTV, payback and margin explained simply, with three worked examples and a Python sheet.
Default Alive or Default Dead? Runway Math for Small Startups
Paul Graham's one-question test for startups, made practical: burn, runway, break-even, a worked SaaS example and a 15-minute monthly check.
