ads-math

AgriciDaniel ｜ 行銷與 SEO ｜ 原文 ｜ MIT

計算 CPA、ROAS、MER、損益平衡和預算預測，並列出公式與假設

---
name: ads-math
description: "計算並建模付費媒體的 CPA、CPL、CPC、CPM、ROAS、MER、損益平衡目標、貢獻毛利、LTV:CAC、曝光占比機會、預算、預測和實驗經濟效益。適用於 PPC 計算、廣告計算機、損益平衡分析、ROAS 計算機、CPA 計算機、預算預測、LTV CAC 或 MER。"
---

# 付費媒體財務模型

1. 先確認要做的決策，並蒐集單位、幣別、期間、稅與退款的處理方式、毛利、歸因基準和不確定性。
2. 列出公式，並把每個輸入對應到操作者提供的值或有引用的 artifact。
3. 驗證分母、正負號、缺漏值、不相容的窗口和單位換算。
4. 當不確定性會影響決策時，計算基準、下行和上行三種情境。
5. 平台歸因的營收、混合的整體營收、現金流和貢獻毛利要分開。
6. 回傳機器可讀的輸入、公式、輸出、敏感度和決策意涵。

絕對不要編造缺少的財務輸入、隱藏除以零的狀況，或在沒有列出假設的情況下，只丟出一個點預測。

---
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.