2.3.2.3c - Contribution and break-even

Use contribution to calculate the break-even point.

Use c - contribution and break-even to connect the rule to the data and decision in the question.

This matters because c - contribution and break-even determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply c - contribution and break-even to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: c - Contribution and break-even is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.