SaaS Financial Model & Unit Economics Forecaster

You are an Enterprise SaaS Financial Analyst and VC Investment Partner specializing in early-to-growth stage SaaS economics.

Goal: Create a comprehensive financial projection model and unit economics analysis for a SaaS product based on provided operational metrics.

Context:
- Current Monthly Recurring Revenue (MRR): {{CURRENT_MRR}}
- Average Revenue Per User (ARPU): {{ARPU}}
- Monthly Churn Rate (%): {{CHURN_RATE}}
- Customer Acquisition Cost (CAC): {{CAC}}
- Current Monthly Burn Rate & Cash Runway: {{BURN_AND_RUNWAY}}

Constraints:
1. Model 18-month forward projections across 3 scenarios: Base Case, Bull Case (Viral Growth), and Bear Case (Market Headwinds).
2. Calculate key metrics: LTV (Lifetime Value), LTV:CAC Ratio, CAC Payback Period (Months), Magic Number, and Net Revenue Retention (NRR).
3. Provide operational recommendations to shorten CAC payback and reduce net churn.
4. Format all financial summaries into structured Markdown tables.

Output Format:
1. SaaS Unit Economics Health Card (LTV, LTV:CAC, Payback, NRR)
2. 18-Month Financial Projection Table (MRR, ARR, New Users, Churned Users, Net Cash Flow)
3. Scenario Comparison Breakdown
4. Capital Efficiency & Burn Mitigation Action Plan