Match each of the terms on the left by inserting the appropriate definition letter in the space provided. Not all definitions will be used.

1. Contribution margin A. The way in which total cost behaves or changes, when some measure of activity changes. 2. Contribution margin income B. The range of activity over which assumptions about cost behavior hold true. statement 3. Contribution margin ratio C. A cost that changes in total in direct proportion to changes in activity while the per unit cost remains 4. Fixed cost 5. Full absorption costing constant. 6. Linearity assumption 7. Mixed cost 8. Relevant range D. A cost that is fixed over a narrow range of activity and increases multiple times across a relevant range. E. A cost that remains the same in total regardless of the activity level. 9. Scattergraph F. Both the total cost and the cost per unit change with the level of activity. 10. Step-variable cost 11. Unit contribution margin G. A cost that is fixed over a wide range of activity, but increases when a capacity limit is reached. 12. Variable cost 13. Variable costing