Six sample audits, fully worked.
Every figure opens to the formula behind it. Open one in the browser, or download it and open it offline — it's the same file either way.
Online store
Paid acquisition, repeat purchase, and first-order contribution — including what happens when CAC exceeds the first-order margin.
Two-location clinic
New vs. returning patients, weighted across two physical sites with different economics.
Course launch
A single campaign, with refunds and payment-processor fees folded into cash payback.
Evergreen funnel
Always-on ad spend evaluated month by month, not as a single launch spike.
Subscription
Churn, lifetime horizon, and payback measured against real subscriber lifespan — including when churn outpaces new signups.
Solo consultancy
Billable hours and a capacity ceiling — deliberately run on partial inputs to show the confidence band widen.