Given:
Company's Net operating Income: $26,900
South division's divisional segment margin: $42,800
West division's divisional segment margin: $29,900
Divisional Segment margin: 72,700
Less: common fixed expenses: x
Company's Net Operating Income 26,900
Work back is needed:
26,900 + x = 72,700
x = 72,700 - 26,900
x = 45,800
The common fixed expenses not traceable to the individual divisions amounts to $45,800