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---
name: ads-math
description: "Calculate and model paid-media CPA, CPL, CPC, CPM, ROAS, MER, break-even targets, contribution margin, LTV:CAC, impression-share opportunity, budgets, forecasts, and experiment economics. Use for PPC math, ad calculator, break-even analysis, ROAS calculator, CPA calculator, budget forecast, LTV CAC, or MER."
---
# Paid Media Financial Model
1. Identify the decision and collect units, currency, period, tax/refund treatment,
margin, attribution basis, and uncertainty.
2. Show the formula and map every input to an operator value or cited artifact.
3. Validate denominators, sign, missing values, incompatible windows, and unit
conversions.
4. Calculate base, downside, and upside cases where uncertainty affects the decision.
5. Keep platform-attributed revenue, blended business revenue, cash flow, and
contribution margin distinct.
6. Return machine-readable inputs, formulas, outputs, sensitivities, and decision
implications.
Never fabricate missing financial inputs, hide division-by-zero, or present a point
forecast without its assumptions.
