Answer:
$20.
Step-by-step explanation:
Given that
Selling price per unit is $50
Variable cost per unit is $30
And, the fixed cost per unit is $5
As we know that the profit would be
= Selling price per unit - variable cost per unit - fixed cost per unit
It is given that if the company sells one unit extra so the profit would remain the same i.e $20 because the fixed cost remains the same
Hence, the correct option is B