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.
Therefore, total variable costs per unit are 50+10+15 = $75. Contribution margin per unit is 100 - 75 or 25. if we sell 20 units of product, total revenues are $2,000 [20 * 100] and total variable costs are 75 * 20 or $1,500.total contribution margin is 2,000 - 1,500 or $500.ontribution margin [CM] is defined as the difference between revenues and variable costs. CM can be calculated on a total or per unit basis. Assume we have a selling price of $100/unit and per-unit variable costs of $50 for labor, $10 for supplies, and $15 for sales commissions.