| 
                 
                    Closing price on 6/14/2019
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    8.60 | 
                 
                
                    | High | 
                    8.60 | 
                 
                
                    | Low | 
                    8.60 | 
                     
                
                    | Volume | 
                    100 | 
                                 
                
                    | Split-adjusted Price | 
                    6.66 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
DAS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                6/14/2019
             | 
            
                -1.40 / -14.00%
             |             
            
                8.60
             |           
            
                8.60
             |               
            
                8.60
             |                           
            
                8.60
             | 
            
                8.60
             |                     
            
                6.66
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                6/13/2019
             | 
            
                0.00 / 0.00%
             |             
            
                10.00
             |           
            
                10.00
             |               
            
                10.00
             |                           
            
                10.00
             | 
            
                10.00
             |                     
            
                7.74
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/12/2019
             | 
            
                -1.70 / -14.53%
             |             
            
                10.00
             |           
            
                10.00
             |               
            
                10.00
             |                           
            
                10.00
             | 
            
                10.00
             |                     
            
                7.74
             |                                 
            
                200
             |            
            
                 
             |                                       
         
    
        
            | 
                6/11/2019
             | 
            
                +1.20 / +11.43%
             |             
            
                10.00
             |           
            
                11.70
             |               
            
                10.00
             |                           
            
                11.70
             | 
            
                11.57
             |                     
            
                9.06
             |                                 
            
                14,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/10/2019
             | 
            
                +1.20 / +12.90%
             |             
            
                10.00
             |           
            
                10.50
             |               
            
                10.00
             |                           
            
                10.50
             | 
            
                10.25
             |                     
            
                8.13
             |                                 
            
                2,000
             |            
            
                 
             |                                       
         
    
        
            | 
                6/7/2019
             | 
            
                0.00 / 0.00%
             |             
            
                9.30
             |           
            
                9.30
             |               
            
                9.30
             |                           
            
                9.30
             | 
            
                9.30
             |                     
            
                7.20
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/6/2019
             | 
            
                0.00 / 0.00%
             |             
            
                9.30
             |           
            
                9.30
             |               
            
                9.30
             |                           
            
                9.30
             | 
            
                9.30
             |                     
            
                7.20
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                6/5/2019
             | 
            
                0.00 / 0.00%
             |             
            
                9.30
             |           
            
                9.30
             |               
            
                9.30
             |                           
            
                9.30
             | 
            
                9.30
             |                     
            
                7.20
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/4/2019
             | 
            
                -1.50 / -13.89%
             |             
            
                9.30
             |           
            
                9.30
             |               
            
                9.30
             |                           
            
                9.30
             | 
            
                9.30
             |                     
            
                7.20
             |                                 
            
                160,100
             |            
            
                 
             |                                       
         
    
        
            | 
                6/3/2019
             | 
            
                -1.80 / -14.29%
             |             
            
                10.90
             |           
            
                10.90
             |               
            
                10.80
             |                           
            
                10.80
             | 
            
                10.88
             |                     
            
                8.36
             |                                 
            
                500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/31/2019
             | 
            
                -0.20 / -1.56%
             |             
            
                12.60
             |           
            
                12.60
             |               
            
                12.60
             |                           
            
                12.60
             | 
            
                12.60
             |                     
            
                9.75
             |                                 
            
                2,000
             |            
            
                 
             |                                       
         
    
        
            | 
                5/30/2019
             | 
            
                +1.50 / +13.27%
             |             
            
                12.00
             |           
            
                12.80
             |               
            
                12.00
             |                           
            
                12.80
             | 
            
                12.61
             |                     
            
                9.91
             |                                 
            
                21,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/29/2019
             | 
            
                +1.30 / +13.00%
             |             
            
                11.30
             |           
            
                11.30
             |               
            
                11.30
             |                           
            
                11.30
             | 
            
                11.30
             |                     
            
                8.75
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                5/28/2019
             | 
            
                -0.10 / -0.99%
             |             
            
                10.00
             |           
            
                10.00
             |               
            
                10.00
             |                           
            
                10.00
             | 
            
                10.00
             |                     
            
                7.74
             |                                 
            
                900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/27/2019
             | 
            
                +1.30 / +14.77%
             |             
            
                7.70
             |           
            
                10.10
             |               
            
                7.70
             |                           
            
                10.10
             | 
            
                9.75
             |                     
            
                7.82
             |                                 
            
                1,200
             |            
            
                 
             |                                       
         
    
        
            | 
                5/24/2019
             | 
            
                -1.50 / -14.56%
             |             
            
                8.80
             |           
            
                8.80
             |               
            
                8.80
             |                           
            
                8.80
             | 
            
                8.80
             |                     
            
                6.81
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/23/2019
             | 
            
                +0.20 / +1.98%
             |             
            
                8.70
             |           
            
                10.30
             |               
            
                8.70
             |                           
            
                10.30
             | 
            
                8.85
             |                     
            
                7.97
             |                                 
            
                1,100
             |            
            
                 
             |                                       
         
    
        
            | 
                5/22/2019
             | 
            
                +1.30 / +14.77%
             |             
            
                10.10
             |           
            
                10.10
             |               
            
                10.00
             |                           
            
                10.10
             | 
            
                10.09
             |                     
            
                7.82
             |                                 
            
                79,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/21/2019
             | 
            
                -1.30 / -12.87%
             |             
            
                8.80
             |           
            
                8.80
             |               
            
                8.80
             |                           
            
                8.80
             | 
            
                8.80
             |                     
            
                6.81
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                5/20/2019
             | 
            
                +1.10 / +12.22%
             |             
            
                10.10
             |           
            
                10.10
             |               
            
                10.10
             |                           
            
                10.10
             | 
            
                10.10
             |                     
            
                7.82
             |                                 
            
                100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/17/2019
             | 
            
                -1.20 / -11.76%
             |             
            
                9.00
             |           
            
                9.00
             |               
            
                9.00
             |                           
            
                9.00
             | 
            
                9.00
             |                     
            
                6.97
             |                                 
            
                1,000
             |            
            
                 
             |                                       
         
    
        
            | 
                5/16/2019
             | 
            
                +0.20 / +2.00%
             |             
            
                11.40
             |           
            
                11.40
             |               
            
                10.00
             |                           
            
                10.20
             | 
            
                10.12
             |                     
            
                7.90
             |                                 
            
                65,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/15/2019
             | 
            
                +1.70 / +20.48%
             |             
            
                9.90
             |           
            
                10.00
             |               
            
                9.90
             |                           
            
                10.00
             | 
            
                9.99
             |                     
            
                7.74
             |                                 
            
                3,500
             |            
            
                 
             |                                       
         
    
        
            | 
                5/14/2019
             | 
            
                +0.20 / +2.47%
             |             
            
                9.30
             |           
            
                9.30
             |               
            
                8.30
             |                           
            
                8.30
             | 
            
                8.67
             |                     
            
                6.43
             |                                 
            
                6,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/13/2019
             | 
            
                +1.00 / +14.08%
             |             
            
                8.10
             |           
            
                8.10
             |               
            
                8.10
             |                           
            
                8.10
             | 
            
                8.10
             |                     
            
                6.27
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                5/10/2019
             | 
            
                +1.00 / +16.13%
             |             
            
                5.40
             |           
            
                7.20
             |               
            
                5.40
             |                           
            
                7.20
             | 
            
                7.10
             |                     
            
                5.57
             |                                 
            
                3,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/9/2019
             | 
            
                -1.00 / -13.89%
             |             
            
                6.50
             |           
            
                6.50
             |               
            
                6.20
             |                           
            
                6.20
             | 
            
                6.32
             |                     
            
                4.80
             |                                 
            
                500
             |            
            
                 
             |                                       
         
    
        
            | 
                5/8/2019
             | 
            
                -1.20 / -14.29%
             |             
            
                7.20
             |           
            
                7.20
             |               
            
                7.20
             |                           
            
                7.20
             | 
            
                7.20
             |                     
            
                5.57
             |                                 
            
                100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/7/2019
             | 
            
                -1.50 / -15.15%
             |             
            
                8.60
             |           
            
                8.60
             |               
            
                8.40
             |                           
            
                8.40
             | 
            
                8.40
             |                     
            
                6.50
             |                                 
            
                5,000
             |            
            
                 
             |                                       
         
    
        
            | 
                5/6/2019
             | 
            
                +0.10 / +1.02%
             |             
            
                8.60
             |           
            
                9.90
             |               
            
                8.40
             |                           
            
                9.90
             | 
            
                9.78
             |                     
            
                7.66
             |                                 
            
                19,900
             |  
            
                 
             |                                                              
             
    
         
    
    
 |