| 
                 
                    Closing price on 1/2/2018
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    4.50 | 
                 
                
                    | High | 
                    4.68 | 
                 
                
                    | Low | 
                    4.27 | 
                     
                
                    | Volume | 
                    115,400 | 
                                 
                
                    | Split-adjusted Price | 
                    4.27 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PXT Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                1/2/2018
             | 
            
                -0.31 / -6.77%
             |             
            
                4.50
             |           
            
                4.68
             |               
            
                4.27
             |                           
            
                4.27
             | 
            
                4.38
             |                     
            
                4.27
             |                                 
            
                115,400
             |            
            
                 
             |                                       
         
    
        
            | 
                12/29/2017
             | 
            
                -0.02 / -0.43%
             |             
            
                4.75
             |           
            
                4.75
             |               
            
                4.41
             |                           
            
                4.58
             | 
            
                4.59
             |                     
            
                4.58
             |                                 
            
                17,430
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/28/2017
             | 
            
                +0.10 / +2.22%
             |             
            
                4.56
             |           
            
                4.70
             |               
            
                4.41
             |                           
            
                4.60
             | 
            
                4.55
             |                     
            
                4.60
             |                                 
            
                16,050
             |            
            
                 
             |                                       
         
    
        
            | 
                12/27/2017
             | 
            
                +0.20 / +4.65%
             |             
            
                4.48
             |           
            
                4.60
             |               
            
                4.36
             |                           
            
                4.50
             | 
            
                4.45
             |                     
            
                4.50
             |                                 
            
                91,460
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/26/2017
             | 
            
                0.00 / 0.00%
             |             
            
                4.13
             |           
            
                4.54
             |               
            
                4.13
             |                           
            
                4.30
             | 
            
                4.39
             |                     
            
                4.30
             |                                 
            
                76,090
             |            
            
                 
             |                                       
         
    
        
            | 
                12/25/2017
             | 
            
                +0.07 / +1.65%
             |             
            
                4.30
             |           
            
                4.35
             |               
            
                4.11
             |                           
            
                4.30
             | 
            
                4.19
             |                     
            
                4.30
             |                                 
            
                34,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/22/2017
             | 
            
                -0.26 / -5.79%
             |             
            
                4.49
             |           
            
                4.49
             |               
            
                4.23
             |                           
            
                4.23
             | 
            
                4.31
             |                     
            
                4.23
             |                                 
            
                2,320
             |            
            
                 
             |                                       
         
    
        
            | 
                12/21/2017
             | 
            
                0.00 / 0.00%
             |             
            
                4.59
             |           
            
                4.59
             |               
            
                4.18
             |                           
            
                4.49
             | 
            
                4.41
             |                     
            
                4.49
             |                                 
            
                28,360
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/20/2017
             | 
            
                +0.29 / +6.90%
             |             
            
                3.95
             |           
            
                4.49
             |               
            
                3.95
             |                           
            
                4.49
             | 
            
                4.41
             |                     
            
                4.49
             |                                 
            
                193,220
             |            
            
                 
             |                                       
         
    
        
            | 
                12/19/2017
             | 
            
                -0.20 / -4.55%
             |             
            
                4.20
             |           
            
                4.40
             |               
            
                4.10
             |                           
            
                4.20
             | 
            
                4.13
             |                     
            
                4.20
             |                                 
            
                19,870
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/18/2017
             | 
            
                +0.20 / +4.76%
             |             
            
                4.20
             |           
            
                4.47
             |               
            
                4.20
             |                           
            
                4.40
             | 
            
                4.32
             |                     
            
                4.40
             |                                 
            
                2,950
             |            
            
                 
             |                                       
         
    
        
            | 
                12/15/2017
             | 
            
                0.00 / 0.00%
             |             
            
                4.20
             |           
            
                4.20
             |               
            
                3.95
             |                           
            
                4.20
             | 
            
                4.09
             |                     
            
                4.20
             |                                 
            
                22,960
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/14/2017
             | 
            
                +0.06 / +1.45%
             |             
            
                4.16
             |           
            
                4.20
             |               
            
                3.86
             |                           
            
                4.20
             | 
            
                3.89
             |                     
            
                4.20
             |                                 
            
                29,060
             |            
            
                 
             |                                       
         
    
        
            | 
                12/13/2017
             | 
            
                -0.31 / -6.97%
             |             
            
                4.20
             |           
            
                4.40
             |               
            
                4.14
             |                           
            
                4.14
             | 
            
                4.15
             |                     
            
                4.14
             |                                 
            
                126,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/12/2017
             | 
            
                +0.15 / +3.49%
             |             
            
                4.59
             |           
            
                4.59
             |               
            
                4.45
             |                           
            
                4.45
             | 
            
                4.52
             |                     
            
                4.45
             |                                 
            
                510
             |            
            
                 
             |                                       
         
    
        
            | 
                12/11/2017
             | 
            
                +0.25 / +6.17%
             |             
            
                4.00
             |           
            
                4.33
             |               
            
                4.00
             |                           
            
                4.30
             | 
            
                4.16
             |                     
            
                4.30
             |                                 
            
                6,220
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/8/2017
             | 
            
                -0.15 / -3.57%
             |             
            
                4.00
             |           
            
                4.20
             |               
            
                4.00
             |                           
            
                4.05
             | 
            
                4.06
             |                     
            
                4.05
             |                                 
            
                15,530
             |            
            
                 
             |                                       
         
    
        
            | 
                12/7/2017
             | 
            
                -0.20 / -4.55%
             |             
            
                4.50
             |           
            
                4.50
             |               
            
                4.10
             |                           
            
                4.20
             | 
            
                4.23
             |                     
            
                4.20
             |                                 
            
                23,870
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/6/2017
             | 
            
                +0.02 / +0.46%
             |             
            
                4.38
             |           
            
                4.55
             |               
            
                4.35
             |                           
            
                4.40
             | 
            
                4.42
             |                     
            
                4.40
             |                                 
            
                4,650
             |            
            
                 
             |                                       
         
    
        
            | 
                12/5/2017
             | 
            
                -0.26 / -5.60%
             |             
            
                4.64
             |           
            
                4.70
             |               
            
                4.38
             |                           
            
                4.38
             | 
            
                4.41
             |                     
            
                4.38
             |                                 
            
                42,670
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/4/2017
             | 
            
                -0.04 / -0.85%
             |             
            
                4.89
             |           
            
                4.89
             |               
            
                4.40
             |                           
            
                4.64
             | 
            
                4.51
             |                     
            
                4.64
             |                                 
            
                77,420
             |            
            
                 
             |                                       
         
    
        
            | 
                12/1/2017
             | 
            
                -0.10 / -2.09%
             |             
            
                4.78
             |           
            
                4.90
             |               
            
                4.68
             |                           
            
                4.68
             | 
            
                4.74
             |                     
            
                4.68
             |                                 
            
                40,910
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/30/2017
             | 
            
                -0.16 / -3.24%
             |             
            
                5.20
             |           
            
                5.20
             |               
            
                4.78
             |                           
            
                4.78
             | 
            
                4.99
             |                     
            
                4.78
             |                                 
            
                61,470
             |            
            
                 
             |                                       
         
    
        
            | 
                11/29/2017
             | 
            
                -0.03 / -0.60%
             |             
            
                4.97
             |           
            
                4.97
             |               
            
                4.70
             |                           
            
                4.94
             | 
            
                4.73
             |                     
            
                4.94
             |                                 
            
                23,930
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/28/2017
             | 
            
                +0.23 / +4.85%
             |             
            
                5.07
             |           
            
                5.07
             |               
            
                4.50
             |                           
            
                4.97
             | 
            
                4.94
             |                     
            
                4.97
             |                                 
            
                117,780
             |            
            
                 
             |                                       
         
    
        
            | 
                11/27/2017
             | 
            
                +0.31 / +7.00%
             |             
            
                4.45
             |           
            
                4.74
             |               
            
                4.44
             |                           
            
                4.74
             | 
            
                4.68
             |                     
            
                4.74
             |                                 
            
                128,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/24/2017
             | 
            
                +0.28 / +6.75%
             |             
            
                4.10
             |           
            
                4.44
             |               
            
                4.10
             |                           
            
                4.43
             | 
            
                4.31
             |                     
            
                4.43
             |                                 
            
                159,300
             |            
            
                 
             |                                       
         
    
        
            | 
                11/23/2017
             | 
            
                +0.10 / +2.47%
             |             
            
                4.09
             |           
            
                4.18
             |               
            
                4.05
             |                           
            
                4.15
             | 
            
                4.11
             |                     
            
                4.15
             |                                 
            
                78,440
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/22/2017
             | 
            
                +0.05 / +1.25%
             |             
            
                3.95
             |           
            
                4.08
             |               
            
                3.95
             |                           
            
                4.05
             | 
            
                4.01
             |                     
            
                4.05
             |                                 
            
                33,900
             |            
            
                 
             |                                       
         
    
        
            | 
                11/21/2017
             | 
            
                -0.09 / -2.20%
             |             
            
                3.90
             |           
            
                4.00
             |               
            
                3.90
             |                           
            
                4.00
             | 
            
                3.93
             |                     
            
                4.00
             |                                 
            
                14,750
             |  
            
                 
             |                                                              
             
    
         
    
    
 |