Direction Corp. has two divisions: West and East. East division has a traceable fixed cost of $1 million. East division has two sub-divisions: Southeast and Northeast. Southeast sub-division has traceable fixed cost of $0.8 million and segment margin of $0.4 million. Northeast sub-division has traceable fixed cost of $0.1 million and segment margin of $0.3 million. What is the segment margin of East division? (Please provide step-by-step on how to drive the final answer; otherwise, no point will be given.)