Stackelberg Duopolists,Firm 1 and Firm 2,face Inverse Market Demand

Multiple Choice

Stackelberg duopolists,Firm 1 and Firm 2,face inverse market demand Both have marginal cost, Firm 1 produces output Q₁ = 15 and Firm 2 produces output Q₂ = 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