Which of the following is an accurate statement regarding gross margin and contribution margin?

All variable costs are subtracted from sales to arrive at both the contribution margin and the gross margin.

Contribution margin and gross margin represent the same concept and therefore the terms may be used interchangeably.

All fixed and variable costs are subtracted from sales to arrive at both the gross margin and the contribution margin.

Gross margin is reached by subtracting both variable and fixed manufacturing costs from sales, while contribution margin is

reached by subtracting all variable costs from sales.