| 
                 
                    Closing price on 11/19/2010
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    10.00 | 
                 
                
                    | High | 
                    10.00 | 
                 
                
                    | Low | 
                    9.60 | 
                     
                
                    | Volume | 
                    37,840 | 
                                 
                
                    | Split-adjusted Price | 
                    9.80 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PXT Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                11/19/2010
             | 
            
                0.00 / 0.00%
             |             
            
                10.00
             |           
            
                10.00
             |               
            
                9.60
             |                           
            
                9.80
             | 
            
                9.80
             |                     
            
                9.80
             |                                 
            
                37,840
             |            
            
                 
             |                                       
         
    
        
            | 
                11/18/2010
             | 
            
                +0.40 / +4.26%
             |             
            
                9.70
             |           
            
                9.80
             |               
            
                9.60
             |                           
            
                9.80
             | 
            
                9.80
             |                     
            
                9.80
             |                                 
            
                41,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/17/2010
             | 
            
                +0.10 / +1.08%
             |             
            
                9.30
             |           
            
                9.50
             |               
            
                9.30
             |                           
            
                9.40
             | 
            
                9.40
             |                     
            
                9.40
             |                                 
            
                28,180
             |            
            
                 
             |                                       
         
    
        
            | 
                11/16/2010
             | 
            
                +0.10 / +1.09%
             |             
            
                9.10
             |           
            
                9.50
             |               
            
                9.00
             |                           
            
                9.30
             | 
            
                9.30
             |                     
            
                9.30
             |                                 
            
                38,770
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/15/2010
             | 
            
                -0.40 / -4.17%
             |             
            
                9.80
             |           
            
                9.80
             |               
            
                9.20
             |                           
            
                9.20
             | 
            
                9.20
             |                     
            
                9.20
             |                                 
            
                57,480
             |            
            
                 
             |                                       
         
    
        
            | 
                11/12/2010
             | 
            
                -0.40 / -4.00%
             |             
            
                9.70
             |           
            
                10.00
             |               
            
                9.50
             |                           
            
                9.60
             | 
            
                9.60
             |                     
            
                9.60
             |                                 
            
                104,110
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/11/2010
             | 
            
                -0.30 / -2.91%
             |             
            
                10.30
             |           
            
                10.30
             |               
            
                10.00
             |                           
            
                10.00
             | 
            
                10.00
             |                     
            
                10.00
             |                                 
            
                66,790
             |            
            
                 
             |                                       
         
    
        
            | 
                11/10/2010
             | 
            
                -0.10 / -0.96%
             |             
            
                10.30
             |           
            
                10.60
             |               
            
                10.30
             |                           
            
                10.30
             | 
            
                10.30
             |                     
            
                10.30
             |                                 
            
                31,830
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/9/2010
             | 
            
                -0.30 / -2.80%
             |             
            
                10.40
             |           
            
                10.70
             |               
            
                10.30
             |                           
            
                10.40
             | 
            
                10.40
             |                     
            
                10.40
             |                                 
            
                39,760
             |            
            
                 
             |                                       
         
    
        
            | 
                11/8/2010
             | 
            
                -0.20 / -1.83%
             |             
            
                11.10
             |           
            
                11.10
             |               
            
                10.70
             |                           
            
                10.70
             | 
            
                10.70
             |                     
            
                10.70
             |                                 
            
                28,930
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/5/2010
             | 
            
                +0.50 / +4.81%
             |             
            
                10.80
             |           
            
                10.90
             |               
            
                10.60
             |                           
            
                10.90
             | 
            
                10.90
             |                     
            
                10.90
             |                                 
            
                133,400
             |            
            
                 
             |                                       
         
    
        
            | 
                11/4/2010
             | 
            
                +0.10 / +0.97%
             |             
            
                10.50
             |           
            
                10.60
             |               
            
                10.30
             |                           
            
                10.40
             | 
            
                10.40
             |                     
            
                10.40
             |                                 
            
                61,410
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/3/2010
             | 
            
                -0.40 / -3.74%
             |             
            
                10.40
             |           
            
                10.70
             |               
            
                10.20
             |                           
            
                10.30
             | 
            
                10.30
             |                     
            
                10.30
             |                                 
            
                75,910
             |            
            
                 
             |                                       
         
    
        
            | 
                11/2/2010
             | 
            
                -0.20 / -1.83%
             |             
            
                10.90
             |           
            
                10.90
             |               
            
                10.50
             |                           
            
                10.70
             | 
            
                10.70
             |                     
            
                10.70
             |                                 
            
                30,080
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/1/2010
             | 
            
                -0.20 / -1.80%
             |             
            
                11.40
             |           
            
                11.40
             |               
            
                10.90
             |                           
            
                10.90
             | 
            
                10.90
             |                     
            
                10.90
             |                                 
            
                20,410
             |            
            
                 
             |                                       
         
    
        
            | 
                10/29/2010
             | 
            
                -0.20 / -1.77%
             |             
            
                11.30
             |           
            
                11.40
             |               
            
                11.10
             |                           
            
                11.10
             | 
            
                11.10
             |                     
            
                11.10
             |                                 
            
                62,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/28/2010
             | 
            
                0.00 / 0.00%
             |             
            
                11.50
             |           
            
                11.50
             |               
            
                11.20
             |                           
            
                11.30
             | 
            
                11.30
             |                     
            
                11.30
             |                                 
            
                8,840
             |            
            
                 
             |                                       
         
    
        
            | 
                10/27/2010
             | 
            
                -0.50 / -4.24%
             |             
            
                12.10
             |           
            
                12.10
             |               
            
                11.30
             |                           
            
                11.30
             | 
            
                11.30
             |                     
            
                11.30
             |                                 
            
                37,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/26/2010
             | 
            
                +0.50 / +4.42%
             |             
            
                11.70
             |           
            
                11.80
             |               
            
                11.70
             |                           
            
                11.80
             | 
            
                11.80
             |                     
            
                11.80
             |                                 
            
                41,500
             |            
            
                 
             |                                       
         
    
        
            | 
                10/25/2010
             | 
            
                +0.10 / +0.89%
             |             
            
                11.20
             |           
            
                11.30
             |               
            
                10.90
             |                           
            
                11.30
             | 
            
                11.30
             |                     
            
                11.30
             |                                 
            
                75,180
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/22/2010
             | 
            
                0.00 / 0.00%
             |             
            
                11.00
             |           
            
                11.30
             |               
            
                11.00
             |                           
            
                11.20
             | 
            
                11.20
             |                     
            
                11.20
             |                                 
            
                71,290
             |            
            
                 
             |                                       
         
    
        
            | 
                10/21/2010
             | 
            
                -0.50 / -4.27%
             |             
            
                11.50
             |           
            
                12.00
             |               
            
                11.20
             |                           
            
                11.20
             | 
            
                11.20
             |                     
            
                11.20
             |                                 
            
                87,220
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/20/2010
             | 
            
                -0.60 / -4.88%
             |             
            
                12.00
             |           
            
                12.00
             |               
            
                11.70
             |                           
            
                11.70
             | 
            
                11.70
             |                     
            
                11.70
             |                                 
            
                155,860
             |            
            
                 
             |                                       
         
    
        
            | 
                10/19/2010
             | 
            
                -0.30 / -2.38%
             |             
            
                12.60
             |           
            
                12.60
             |               
            
                12.20
             |                           
            
                12.30
             | 
            
                12.30
             |                     
            
                12.30
             |                                 
            
                78,190
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/18/2010
             | 
            
                +0.20 / +1.61%
             |             
            
                12.60
             |           
            
                13.00
             |               
            
                12.40
             |                           
            
                12.60
             | 
            
                12.60
             |                     
            
                12.60
             |                                 
            
                51,820
             |            
            
                 
             |                                       
         
    
        
            | 
                10/15/2010
             | 
            
                -0.10 / -0.80%
             |             
            
                12.20
             |           
            
                12.90
             |               
            
                12.20
             |                           
            
                12.40
             | 
            
                12.40
             |                     
            
                12.40
             |                                 
            
                24,330
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/14/2010
             | 
            
                -0.10 / -0.79%
             |             
            
                12.80
             |           
            
                12.80
             |               
            
                12.50
             |                           
            
                12.50
             | 
            
                12.50
             |                     
            
                12.50
             |                                 
            
                29,690
             |            
            
                 
             |                                       
         
    
        
            | 
                10/13/2010
             | 
            
                +0.20 / +1.61%
             |             
            
                12.70
             |           
            
                12.80
             |               
            
                12.50
             |                           
            
                12.60
             | 
            
                12.60
             |                     
            
                12.60
             |                                 
            
                31,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/12/2010
             | 
            
                -0.20 / -1.59%
             |             
            
                12.60
             |           
            
                12.60
             |               
            
                12.20
             |                           
            
                12.40
             | 
            
                12.40
             |                     
            
                12.40
             |                                 
            
                24,800
             |            
            
                 
             |                                       
         
    
        
            | 
                10/11/2010
             | 
            
                -0.10 / -0.79%
             |             
            
                12.70
             |           
            
                12.80
             |               
            
                12.60
             |                           
            
                12.60
             | 
            
                12.60
             |                     
            
                12.60
             |                                 
            
                27,900
             |  
            
                 
             |                                                              
             
    
         
    
    
 |