Answer:
Degree of operating leverage.
Step-by-step explanation:
As we know that the formula of the degree of operating leverage which is given below:
= (Sales - Variable costs) รท (Sales - Variable costs - Fixed costs)
where,
Contribution margin = (Sales - Variable costs)
And,
EBIT i.e Pretax Income = (Sales - Variable costs - Fixed costs)
So the first option is correct and the same is to be considered