Answer:
A's segment profit margin is: $151,000
Step-by-step explanation:
Calculation of A's segment profit margin
Sales revenue $ 810,000
Less Variable operating expenses ($319,000)
Controllable Contribution $491,000
Less Fixed expenses:
Traceable to A and controllable by A ($230,000)
Traceable to A and controllable by others ($111,000)
Profit Margin $151,000