Answer:
Option (a) is correct.
Explanation:
Given that,
Sales = $1,000,000
Contribution margin = 200,000
Total direct fixed costs = 120,000
Average total operating assets = 400,000
Controllable margin for the year:
= Contribution margin - Controllable fixed cost
= $200,000 - $120,000
= $80,000
Therefore, the controllable margin for the year is $80,000.