A product can generate a positive amount after variable costs and still fail to cover the project's fixed costs. A simple contribution calculation helps students make that distinction before presenting a business conclusion.
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Define which costs change with quantity
A fictional student project sells an item for 30 currency units. Materials cost 12 per item, packaging costs 3 and a transaction fee is 1 per item. Variable cost is 16, leaving contribution of 14 per item.
The word contribution means the amount available toward fixed costs and, after those are covered, profit. It is not automatically profit of 14 on every sale.
Include the fixed amount
Assume fixed costs of 280 and no other costs. Twenty sales provide 20 × 14 = 280 contribution, exactly covering fixed costs. At 15 sales, the project has 210 - 280 = -70.
These are model results, not evidence that 20 customers will buy. Demand needs a separate basis, and uncounted labour or refunds could change the costs.
Test a discount before recommending it
If price falls to 26 while variable cost remains 16, contribution falls to 10. The simplified break-even quantity rises to 28. A lower price would need an appropriately supported demand response to justify a better outcome.
This original example teaches general business reasoning, not an official CBPA template or a completed submission. Keep assumptions visible and consult the organiser's current programme requirements for the activity itself.
Continue reading: CBPA Business Projects: Build a Sales Forecast You Can Explain.
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Official information and further reading: Source 1
