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.
In the case of contribution margin per unit, it can also refer to a per unit measure of a product's gross operating margin because it is calculated simply as the product's price minus its total variable costs.Definition. Contribution Margin (CM) is the difference between sales revenue and variable costs.mail. In the case of contribution margin per unit, it can also refer to a per unit measure of a product's gross operating margin because it is calculated simply as the product's price minus its total variable costs. Definition. Contribution Margin (CM) is the difference between sales revenue and variable costs.