Stackelberg Duopolists, Firm 1 and Firm 2, Face Inverse Market $P = 50 - Q$

Multiple Choice

Stackelberg duopolists, Firm 1 and Firm 2, face inverse market demand $P = 50 - Q$ . Both have marginal cost, $M C = \$ 20$ . Firm 1 produces output $Q _ { 1 } = 15$ and Firm 2 produces output $Q _ { 2 } = 7.5$ . What is the price level in this market and what is the level of industry profits (i.e., the sum of Firm 1 and Firm 2's profits) ?

A) $P = 27.5$ ; industry profits $= 168.75$
B) $P = 30$ ; industry profits $= 172.6$
C) $P = 32.5$ ; industry profits $= 180$
D) $P = 34$ ; industry profits $= 184.2$