Now suppose United Air Lines enters the Atlanta market. Consider this to be an oligopoly market with two firms that behave in a Cournot Model fashion. The market demand schedule is cost schedule for...

Now suppose United Air Lines enters the Atlanta market.  Consider this to be an oligopoly market with two firms that behave in a Cournot Model fashion.  The market demand schedule is cost schedule for both firms are:
P = 400 - .5*Q,
and firm level cost for both firms is
MC=AC=Scomp=100.
What is the Cournot Market Price