The demand for DVD players in a country is given by D = 300 - 0.2P,where P is the price of a DVD player.Supply by domestic producers is given by S = 100 + 0.8P.The world price of a DVD player equals $100 and this economy is open to trade.If a quota of 50 units is placed on DVD player imports,the quantity of DVD players demanded domestically will change from _______ with no quota to _______ with the quota.

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Without the quota, at the world price of $100, demand is 280 units (D = 300 - 0.2*100). With the quota, domestic supply is 180 units (S = 100 + 0.8*100), and imports are limited to 50 units, so total supply is 230 units. At this supply level, the price must rise to clear the market, reducing demand to 270 units.

The Demand for DVD Players in a Country Is Given