Answer: b) $300000
Step-by-step explanation:
Controllable margin controls revenues and cost to show that an operation process is balanced and controlled. To check a manager's performance, The Controllable margin is evaluated and is defined as the contribution margin minus the controllable fixed cost.
Given
Controllable fixed cost = $ 180,000
Contribution margin =$480, 000
Controllable margin = Contribution margin - Controllable fixed cost
=$480,000- 180,000
= $300,000