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.
The first variable you need to find for the contribution margin equation is its unit revenue â in other words, the price it's sold for. The confusing term unit revenue is used in economics because the product's price is equal to the revenue generated by the sale of a single product (or one unit).ontribution margin is a concept often used in a branch of managerial accounting known as cost-volume-profit (CVP) analysis. A single product's contribution margin is given with the formula P-V, where P is the cost of the product and V is its variable cost.