Contribution margin can be expressed on a per unit basis as the sum of the expenses of the firm that are stable and do not change with the quantity of a product that is produced and sold. sum of the expenses of the firm that change with the quantity of a product that is produced and sold. difference between unit selling price and unit variable cost. average amount of money received for selling one unit of a product or simply the price of that unit. O change in total cost that results from producing and marketing one additional unit of a product.

Contribution margin can be expressed on a per unit basis as the sum of the expenses of the firm that are stable and do not change with the quantity of a product that is produced and sold. sum of the expenses of the firm that change with the quantity of a product that is produced and sold. difference between unit selling price and unit variable cost. average amount of money received for selling one unit of a product or simply the price of that unit. change in total cost that results from producing and marketing one additional unit of a product