In the market for MP3 Players, the supply curve is the typical upward-sloping straight line, and the demand curve is the typical downward-sloping straight line. The equilibrium quantity in the market for MP3 Players is 250 per month when there is no tax. Then a tax of $6 per MP3 Player is imposed. As a result, the government is able to raise $750 per month in tax revenue in this market. What is the after-tax quantity of MP3 Players in this market?