posted by Ron .
Opera CD buyers are located in New York and Los Angeles. At the current price for a CD, $25 in both New York
and Los Angeles, aggregate demand for Opera CD is 10,000 units (i.e. the sum of the demand in New York and Los Angeles); and the price elasticity of demand for Opera CD in New York and Los Anglees are -3 and -7 respectively. If the slope of each demand curve in New York is the same as in Los Angeles, then the quantity of Opera CDs demanded in Los Angles is?