Answer and Explanation:
The preparation of the properly constructed segmented income statement in a contribution format is presented below
Sales $390,000 
Less: Variable expense -$210,000 
Contribution margin $180,000 
Less: Traceable fixed expenses -$46,000 
Segment Margin $134,000
For computing the segment margin we deduct the traceable fixed expenses and the variable expenses from the sales revenue so that the segment margin could come