CDs   Sex
 220   Female 
  20   Female 
  50   Male   
 450   Male   
 300   Male   
  30   Female 
  20   Female 
  50   Female 
 200   Male   
  35   Female 
  25   Female 
  50   Male   
 250   Female 
 100   Male   
   0   Male   
 100   Male   
  20   Male   
  13   Male   
 200   Male   
   2   Female 
 125   Male   
 150   Male   
  90   Male   
  60   Female