MK-069 | Post-discount profit calculation
For a regular chat, upload packs/mk-069.md. It includes the shared rules, this method, and required references
Purpose
This skill delivers: Joint calculation of discounts, gifts, and logistics
Recalculability does not mean the data is complete; break-even points and cost ceilings apply only under the stated assumptions
Required inputs
Provide: Discount/gift offer, discounted net revenue, order variable costs, additional promotional and fulfillment costs, and the brand contribution floor
For method questions, provide the formula, variables and an example directly; for a calculation, ask only for missing operands
Method
- Recalculate revenue, variable costs, and the contribution margin ratio after discounting to check whether the brand's acceptable floor is breached
- Discounts are not evaluated on revenue alone. If the contribution margin ratio is below the course's 25% benchmark, prioritize cost reduction, higher average order value, or pricing/bundle adjustments
- Include costs from gifts, free shipping, and discounts, not merely the percentage off the list price
Calculations and interpretation
Post-discount contribution per order = discounted net revenue − order variable costs − additional promotional fulfillment costs
Retain original values, units, periods, and substituted formulas. The formula is not an unconditional guarantee of results
Define gross profit, contribution margin, cost denominators, and periods explicitly; do not copy classroom example numbers as universal thresholds
Required output fields
| Order | Field | How to complete |
|---|---|---|
| 1 | Input variable | Use source evidence, an intermediate method result, or an explicit unknown; do not invent information |
| 2 | Value | Use source evidence, an intermediate method result, or an explicit unknown; do not invent information |
| 3 | Unit and definition | Use source evidence, an intermediate method result, or an explicit unknown; do not invent information |
| 4 | Source | Use source evidence, an intermediate method result, or an explicit unknown; do not invent information |
| 5 | Formula | Use source evidence, an intermediate method result, or an explicit unknown; do not invent information |
| 6 | Result | Use source evidence, an intermediate method result, or an explicit unknown; do not invent information |
| 7 | Limitations | Use source evidence, an intermediate method result, or an explicit unknown; do not invent information |
Verification cases
MK-069-C05 | A required denominator is zero
Expected: Report that the formula is undefined; do not output a zero cost or an infinite target
MK-069-C06 | Only some costs are supplied
Expected: Retain the partial result and excluded items; do not call it complete profitability
Method sources
Source file: 行銷策略實戰學程Day2-以終為始x降低成本x提升指標
Location: Costs
Source basis: extracted from course materials
Source URL: https://docs.google.com/presentation/d/1NdxlcqAKMPHqGVS5jbjSYR_UgOJSA0fS65OnTtQLEHQ/edit
English translation of source excerpt:
Begin with the end in mind x reduce costs x improve metrics
