quest

Sign in to start training

quest keeps your progress, streaks, and scores tied to your account — so you can pick up on any device.

Synced everywhere. Progress follows you across laptop and phone.

Streaks & stats. See your daily run and every score over time.

Your profile. A name and avatar for the work you do here.

We only use Google to sign you in and sync progress. No posting, no contacts — ever.

Business Intermediate

01 Unit Economics

Unit economics is where judgment meets arithmetic. The grader checks both: your numbers have to be right AND your read of them has to be sound. A channel isn't 'good' because it brings sales; it's good when a customer earns back more than it cost to acquire.

Step 1 / 2

A paid channel has: CAC = $40, ARPU = $8/month, gross margin = 70%, monthly churn = 5%. Estimate customer lifetime (months), LTV (gross-margin based), the LTV:CAC ratio, and whether this channel is viable. Show your working.

Hints

Average lifetime (months) is roughly 1 / monthly churn.
LTV = ARPU x gross margin x lifetime.
A common viability bar is LTV:CAC of about 3 or higher.