Answer:
A's segment profit margin is $105,000.
Explanation:
To measure the economic performance of the division, we include other items that the divisional manager can not influence but traceable to the division.
Miracle Green Corporation
Calculation of Store A segment profit margin
Sales revenue                                   $900,000
Less operating expenses                         ($400,000)
Controllable Contribution                          $500,000
Less Fixed Expenses
Traceable to A and controllable by A Â Â Â Â Â Â Â Â Â Â Â Â Â Â ($275,000)
Controllable Profit                               $225,000
Less Fixed Expenses
Traceable to A and controllable by others           ($120,000)
Segment Profit Margin                            $105,000