Suppose there are 100 consumers in the computer speaker market, each with an identical demand curve given by Q_i= 10 - 0.1P, where P is the price per pair of speakers, and Q_i measures the quantity demanded of computer speakers by each person. The market supply for computer speakers is given by Q^S = 20P - 200. The equilibrium quantity in the computer speaker market is ____.

100

600

300

40