A socio-ecological system consists of 'a bio-geo-physical' unit and its associated social actors and institutions.
Contribution Margin. Contribution margin is a productâs price minus all associated variable costs, resulting in the incremental profit earned for each unit sold. The total contribution margin generated by an entity represents the total earnings available to pay for fixed expenses and to generate a profit. The contribution margin concept is useful for deciding whether to allow a lower price in special pricing situations.
Definition: Variable contribution margin is the margin that results when variable production costs are subtracted from revenue. It is most useful for making incremental pricing decisions where an entity must cover its variable costs, though not necessarily all of its fixed costs.