Excel Lab — Margin, Markup and Break-Even
Separate gross margin, markup and contribution, then calculate break-even using an explicit product mix. Includes a live two-product Excel model.

Connect reported performance to cash, working capital and value creation.
Start with concepts, move to practical questions, then explore specialised subjects. Levels are editorial guidance, not a qualification or assessment. Only stages with selected resources are shown; unclassified publications remain available in the library.
Separate gross margin, markup and contribution, then calculate break-even using an explicit product mix. Includes a live two-product Excel model.
Look beyond product margin to the ordering, fulfilment and support effort behind a sale. A useful cost-to-serve model explains the decision and its limits.
Follow inventory, customer collections and supplier payments to understand where operating cash is tied up—and which process can release it responsibly.
A trend becomes useful when it leads to a specific question, a testable explanation and evidence that supports the conclusion.
An illustrative working-capital estimate shows how added sales can require funding. It does not establish actual earnings quality, which requires company-period evidence and a reconciliation of profit to operating cash flow.
A practical P&L analysis toolkit that connects financial variance with the operational driver, business explanation, risk, and management action.
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