| 
                 
                    Closing price on 3/26/2019
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    54.00 | 
                 
                
                    | High | 
                    57.00 | 
                 
                
                    | Low | 
                    54.00 | 
                     
                
                    | Volume | 
                    5,100 | 
                                 
                
                    | Split-adjusted Price | 
                    31.33 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
SLS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                3/26/2019
             | 
            
                +0.40 / +0.71%
             |             
            
                54.00
             |           
            
                57.00
             |               
            
                54.00
             |                           
            
                56.40
             | 
            
                54.29
             |                     
            
                31.33
             |                                 
            
                5,100
             |            
            
                 
             |                                       
         
    
        
            | 
                3/25/2019
             | 
            
                -1.00 / -1.75%
             |             
            
                56.00
             |           
            
                56.90
             |               
            
                54.50
             |                           
            
                56.00
             | 
            
                55.39
             |                     
            
                31.11
             |                                 
            
                11,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/22/2019
             | 
            
                +0.90 / +1.60%
             |             
            
                57.00
             |           
            
                57.00
             |               
            
                57.00
             |                           
            
                57.00
             | 
            
                57.00
             |                     
            
                31.66
             |                                 
            
                500
             |            
            
                 
             |                                       
         
    
        
            | 
                3/21/2019
             | 
            
                -2.60 / -4.43%
             |             
            
                58.70
             |           
            
                58.70
             |               
            
                56.00
             |                           
            
                56.10
             | 
            
                56.36
             |                     
            
                31.16
             |                                 
            
                2,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/20/2019
             | 
            
                +1.80 / +3.16%
             |             
            
                57.00
             |           
            
                58.70
             |               
            
                57.00
             |                           
            
                58.70
             | 
            
                57.68
             |                     
            
                32.61
             |                                 
            
                2,500
             |            
            
                 
             |                                       
         
    
        
            | 
                3/19/2019
             | 
            
                +0.10 / +0.18%
             |             
            
                56.10
             |           
            
                58.00
             |               
            
                56.00
             |                           
            
                56.90
             | 
            
                57.17
             |                     
            
                31.61
             |                                 
            
                4,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/18/2019
             | 
            
                -2.00 / -3.40%
             |             
            
                58.50
             |           
            
                59.00
             |               
            
                56.60
             |                           
            
                56.80
             | 
            
                58.01
             |                     
            
                31.55
             |                                 
            
                11,400
             |            
            
                 
             |                                       
         
    
        
            | 
                3/15/2019
             | 
            
                +0.20 / +0.34%
             |             
            
                58.60
             |           
            
                58.80
             |               
            
                56.00
             |                           
            
                58.80
             | 
            
                58.04
             |                     
            
                32.66
             |                                 
            
                14,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/14/2019
             | 
            
                -1.40 / -2.33%
             |             
            
                59.20
             |           
            
                59.20
             |               
            
                58.60
             |                           
            
                58.60
             | 
            
                59.04
             |                     
            
                32.55
             |                                 
            
                9,700
             |            
            
                 
             |                                       
         
    
        
            | 
                3/13/2019
             | 
            
                -0.50 / -0.83%
             |             
            
                60.30
             |           
            
                61.00
             |               
            
                59.00
             |                           
            
                60.00
             | 
            
                60.04
             |                     
            
                33.33
             |                                 
            
                6,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/12/2019
             | 
            
                +1.50 / +2.54%
             |             
            
                58.50
             |           
            
                60.60
             |               
            
                58.30
             |                           
            
                60.50
             | 
            
                59.29
             |                     
            
                33.61
             |                                 
            
                10,500
             |            
            
                 
             |                                       
         
    
        
            | 
                3/11/2019
             | 
            
                +1.50 / +2.61%
             |             
            
                57.50
             |           
            
                59.00
             |               
            
                56.00
             |                           
            
                59.00
             | 
            
                57.55
             |                     
            
                32.77
             |                                 
            
                11,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/8/2019
             | 
            
                -0.50 / -0.86%
             |             
            
                57.00
             |           
            
                58.00
             |               
            
                56.00
             |                           
            
                57.50
             | 
            
                57.15
             |                     
            
                31.94
             |                                 
            
                22,800
             |            
            
                 
             |                                       
         
    
        
            | 
                3/7/2019
             | 
            
                +4.90 / +9.23%
             |             
            
                53.00
             |           
            
                58.30
             |               
            
                53.00
             |                           
            
                58.00
             | 
            
                55.59
             |                     
            
                32.22
             |                                 
            
                44,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/6/2019
             | 
            
                +3.00 / +5.99%
             |             
            
                52.00
             |           
            
                53.50
             |               
            
                50.20
             |                           
            
                53.10
             | 
            
                51.78
             |                     
            
                29.50
             |                                 
            
                15,200
             |            
            
                 
             |                                       
         
    
        
            | 
                3/5/2019
             | 
            
                -2.60 / -4.93%
             |             
            
                52.80
             |           
            
                52.80
             |               
            
                48.10
             |                           
            
                50.10
             | 
            
                50.79
             |                     
            
                27.83
             |                                 
            
                15,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/4/2019
             | 
            
                +1.80 / +3.54%
             |             
            
                49.00
             |           
            
                54.00
             |               
            
                49.00
             |                           
            
                52.70
             | 
            
                52.77
             |                     
            
                29.27
             |                                 
            
                15,200
             |            
            
                 
             |                                       
         
    
        
            | 
                3/1/2019
             | 
            
                +4.60 / +9.94%
             |             
            
                47.00
             |           
            
                50.90
             |               
            
                47.00
             |                           
            
                50.90
             | 
            
                50.04
             |                     
            
                28.27
             |                                 
            
                16,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/28/2019
             | 
            
                +0.30 / +0.65%
             |             
            
                46.00
             |           
            
                46.80
             |               
            
                46.00
             |                           
            
                46.30
             | 
            
                46.22
             |                     
            
                25.72
             |                                 
            
                27,400
             |            
            
                 
             |                                       
         
    
        
            | 
                2/27/2019
             | 
            
                -1.40 / -2.95%
             |             
            
                46.20
             |           
            
                46.20
             |               
            
                46.00
             |                           
            
                46.00
             | 
            
                46.01
             |                     
            
                25.55
             |                                 
            
                5,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/26/2019
             | 
            
                -0.10 / -0.21%
             |             
            
                47.00
             |           
            
                47.40
             |               
            
                46.00
             |                           
            
                47.40
             | 
            
                46.44
             |                     
            
                26.33
             |                                 
            
                9,100
             |            
            
                 
             |                                       
         
    
        
            | 
                2/25/2019
             | 
            
                0.00 / 0.00%
             |             
            
                48.50
             |           
            
                48.50
             |               
            
                46.60
             |                           
            
                47.50
             | 
            
                47.18
             |                     
            
                26.38
             |                                 
            
                3,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/22/2019
             | 
            
                0.00 / 0.00%
             |             
            
                46.00
             |           
            
                48.00
             |               
            
                46.00
             |                           
            
                47.50
             | 
            
                47.50
             |                     
            
                26.38
             |                                 
            
                3,200
             |            
            
                 
             |                                       
         
    
        
            | 
                2/21/2019
             | 
            
                +0.10 / +0.21%
             |             
            
                49.00
             |           
            
                49.00
             |               
            
                47.00
             |                           
            
                47.50
             | 
            
                47.44
             |                     
            
                26.38
             |                                 
            
                6,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/20/2019
             | 
            
                +0.10 / +0.21%
             |             
            
                47.30
             |           
            
                49.00
             |               
            
                47.30
             |                           
            
                47.40
             | 
            
                47.38
             |                     
            
                26.33
             |                                 
            
                7,200
             |            
            
                 
             |                                       
         
    
        
            | 
                2/19/2019
             | 
            
                -1.70 / -3.47%
             |             
            
                49.50
             |           
            
                49.50
             |               
            
                47.00
             |                           
            
                47.30
             | 
            
                47.45
             |                     
            
                26.27
             |                                 
            
                2,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/18/2019
             | 
            
                +2.60 / +5.60%
             |             
            
                46.00
             |           
            
                49.00
             |               
            
                46.00
             |                           
            
                49.00
             | 
            
                48.14
             |                     
            
                27.22
             |                                 
            
                1,600
             |            
            
                 
             |                                       
         
    
        
            | 
                2/15/2019
             | 
            
                +1.80 / +4.04%
             |             
            
                44.60
             |           
            
                46.40
             |               
            
                44.60
             |                           
            
                46.40
             | 
            
                44.98
             |                     
            
                25.77
             |                                 
            
                900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/14/2019
             | 
            
                +0.80 / +1.83%
             |             
            
                43.80
             |           
            
                45.00
             |               
            
                43.80
             |                           
            
                44.60
             | 
            
                44.39
             |                     
            
                24.77
             |                                 
            
                1,700
             |            
            
                 
             |                                       
         
    
        
            | 
                2/13/2019
             | 
            
                +1.10 / +2.58%
             |             
            
                44.30
             |           
            
                44.30
             |               
            
                43.80
             |                           
            
                43.80
             | 
            
                43.85
             |                     
            
                24.33
             |                                 
            
                1,700
             |  
            
                 
             |                                                              
             
    
         
    
    
 |