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Read fictional unit economics and a monthly profit bridge. Distinguish revenue, gross profit, contribution, operating profit and cash while testing a discount and cost shock.
Four guided lessons, hands-on decision sequences, practice checks, and final decisions. Build a plan, test it, then examine the reasoning. Progress stays on this device only.
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After this lesson: Subtract variable costs from net sales price.
Contribution per unit is net selling price less variable cost tied to that sale. Gross profit may use a different cost classification; show what is included. Contribution pays fixed costs first, then can support operating profit.
A gift box sells for $40 net. Product and packaging cost $18, payment and fulfillment cost $6. Contribution is $40 − $24 = $16 before fixed overhead.
Use the briefing above. Select the actions in the order you would take them, then run the sequence.
Apply it: Identify what must be paid before calling a sale profitable.
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After this lesson: Divide fixed costs by positive contribution per unit.
Break-even units equal fixed costs divided by contribution per unit under the stated simple assumptions. Round up to a whole unit. This is a model, not a guarantee: mix, capacity, returns, and changing costs matter.
Fixed monthly overhead is $8,000 and contribution is $16 per box. Break-even is 500 boxes, assuming every unit earns that contribution and there are no other effects.
Use the briefing above. Select the actions in the order you would take them, then run the sequence.
Apply it: Check whether the required sales volume is feasible.
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After this lesson: Move from contribution to operating profit without confusing cash.
Revenue minus variable costs gives total contribution in this simplified model. Subtract fixed operating expenses for operating profit before tax and financing effects. Inventory purchase and receivable timing can make bank cash differ sharply.
600 boxes × $16 contribution = $9,600. Less $8,000 fixed overhead gives $1,600 simplified operating profit. If a retailer has not paid, cash can still be tight.
Use the briefing above. Select the actions in the order you would take them, then run the sequence.
Apply it: Explain a profitable month with low bank balance.
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After this lesson: Model how a discount or cost increase changes break-even.
A discount cuts contribution dollar for dollar if variable cost stays fixed. A cost increase has the same directional effect. Recompute break-even and compare expected incremental volume; avoid a promotion that looks busy but weakens total profit.
Price falls from $40 to $36 while variable cost remains $24. Contribution falls from $16 to $12. With $8,000 fixed costs, break-even rises from 500 to 667 units after rounding up.
Use the briefing above. Select the actions in the order you would take them, then run the sequence.
Apply it: Decide whether a discount earns enough extra units to cover its cost.
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Three new scenarios check what you retained. A missed answer opens a worked explanation and a reworded question.
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Keep learning with the hands-on case. Test preparation is a separate, harder stage that asks you to calculate, inspect assumptions, and apply the method to unfamiliar facts.
Subject-specific practice tiers are in development. No external exam readiness claim is made here.
Original Aim High Hero explanations and fictional exercises. The external source provides subject reference and does not endorse this course.
U.S. Small Business Administration — Break-even point ↗SBA — Manage your finances ↗IRS — Small business tax center ↗