| 
                 
                    Closing price on 4/26/2019
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    42.50 | 
                 
                
                    | High | 
                    42.50 | 
                 
                
                    | Low | 
                    41.00 | 
                     
                
                    | Volume | 
                    8,300 | 
                                 
                
                    | Split-adjusted Price | 
                    23.05 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
SLS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                4/26/2019
             | 
            
                -1.40 / -3.26%
             |             
            
                42.50
             |           
            
                42.50
             |               
            
                41.00
             |                           
            
                41.50
             | 
            
                41.69
             |                     
            
                23.05
             |                                 
            
                8,300
             |            
            
                 
             |                                       
         
    
        
            | 
                4/25/2019
             | 
            
                -0.10 / -0.23%
             |             
            
                43.00
             |           
            
                43.50
             |               
            
                42.90
             |                           
            
                42.90
             | 
            
                43.31
             |                     
            
                23.83
             |                                 
            
                10,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/24/2019
             | 
            
                -2.00 / -4.44%
             |             
            
                42.60
             |           
            
                44.00
             |               
            
                42.00
             |                           
            
                43.00
             | 
            
                42.89
             |                     
            
                23.89
             |                                 
            
                10,000
             |            
            
                 
             |                                       
         
    
        
            | 
                4/23/2019
             | 
            
                +0.40 / +0.90%
             |             
            
                45.00
             |           
            
                48.00
             |               
            
                45.00
             |                           
            
                45.00
             | 
            
                45.59
             |                     
            
                25.00
             |                                 
            
                2,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/22/2019
             | 
            
                -4.60 / -9.35%
             |             
            
                48.70
             |           
            
                48.70
             |               
            
                44.30
             |                           
            
                44.60
             | 
            
                44.87
             |                     
            
                24.77
             |                                 
            
                26,400
             |            
            
                 
             |                                       
         
    
        
            | 
                4/19/2019
             | 
            
                +0.10 / +0.20%
             |             
            
                49.10
             |           
            
                49.20
             |               
            
                49.10
             |                           
            
                49.20
             | 
            
                49.12
             |                     
            
                27.33
             |                                 
            
                1,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/18/2019
             | 
            
                -1.10 / -2.19%
             |             
            
                50.00
             |           
            
                50.50
             |               
            
                49.10
             |                           
            
                49.10
             | 
            
                50.05
             |                     
            
                27.27
             |                                 
            
                2,200
             |            
            
                 
             |                                       
         
    
        
            | 
                4/17/2019
             | 
            
                0.00 / 0.00%
             |             
            
                50.20
             |           
            
                50.20
             |               
            
                50.20
             |                           
            
                50.20
             | 
            
                50.20
             |                     
            
                27.88
             |                                 
            
                200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/16/2019
             | 
            
                -1.30 / -2.52%
             |             
            
                50.00
             |           
            
                50.40
             |               
            
                50.00
             |                           
            
                50.20
             | 
            
                50.09
             |                     
            
                27.88
             |                                 
            
                1,600
             |            
            
                 
             |                                       
         
    
        
            | 
                4/12/2019
             | 
            
                +0.10 / +0.19%
             |             
            
                53.00
             |           
            
                53.00
             |               
            
                51.50
             |                           
            
                51.50
             | 
            
                52.27
             |                     
            
                28.61
             |                                 
            
                1,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/11/2019
             | 
            
                -0.40 / -0.77%
             |             
            
                51.90
             |           
            
                51.90
             |               
            
                50.20
             |                           
            
                51.40
             | 
            
                50.34
             |                     
            
                28.55
             |                                 
            
                5,000
             |            
            
                 
             |                                       
         
    
        
            | 
                4/10/2019
             | 
            
                -0.10 / -0.19%
             |             
            
                50.20
             |           
            
                51.80
             |               
            
                50.00
             |                           
            
                51.80
             | 
            
                50.22
             |                     
            
                28.77
             |                                 
            
                2,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/9/2019
             | 
            
                -1.00 / -1.89%
             |             
            
                52.00
             |           
            
                52.50
             |               
            
                50.60
             |                           
            
                51.90
             | 
            
                51.06
             |                     
            
                28.83
             |                                 
            
                19,800
             |            
            
                 
             |                                       
         
    
        
            | 
                4/8/2019
             | 
            
                -0.20 / -0.38%
             |             
            
                52.00
             |           
            
                52.90
             |               
            
                50.60
             |                           
            
                52.90
             | 
            
                51.00
             |                     
            
                29.38
             |                                 
            
                18,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/5/2019
             | 
            
                0.00 / 0.00%
             |             
            
                52.00
             |           
            
                53.10
             |               
            
                51.00
             |                           
            
                53.10
             | 
            
                51.93
             |                     
            
                29.50
             |                                 
            
                1,900
             |            
            
                 
             |                                       
         
    
        
            | 
                4/4/2019
             | 
            
                -0.10 / -0.19%
             |             
            
                53.50
             |           
            
                54.00
             |               
            
                52.00
             |                           
            
                53.10
             | 
            
                53.57
             |                     
            
                29.50
             |                                 
            
                5,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/3/2019
             | 
            
                0.00 / 0.00%
             |             
            
                53.20
             |           
            
                53.20
             |               
            
                53.20
             |                           
            
                53.20
             | 
            
                53.20
             |                     
            
                29.55
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                4/2/2019
             | 
            
                -2.60 / -4.66%
             |             
            
                55.70
             |           
            
                55.70
             |               
            
                53.20
             |                           
            
                53.20
             | 
            
                53.83
             |                     
            
                29.55
             |                                 
            
                3,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/1/2019
             | 
            
                +1.80 / +3.33%
             |             
            
                55.80
             |           
            
                55.80
             |               
            
                55.80
             |                           
            
                55.80
             | 
            
                55.80
             |                     
            
                31.00
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                3/29/2019
             | 
            
                -1.90 / -3.40%
             |             
            
                54.00
             |           
            
                55.90
             |               
            
                54.00
             |                           
            
                54.00
             | 
            
                54.71
             |                     
            
                30.00
             |                                 
            
                5,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/28/2019
             | 
            
                -0.10 / -0.18%
             |             
            
                55.60
             |           
            
                56.00
             |               
            
                55.60
             |                           
            
                55.90
             | 
            
                55.88
             |                     
            
                31.05
             |                                 
            
                800
             |            
            
                 
             |                                       
         
    
        
            | 
                3/27/2019
             | 
            
                -0.40 / -0.71%
             |             
            
                56.00
             |           
            
                56.00
             |               
            
                56.00
             |                           
            
                56.00
             | 
            
                56.00
             |                     
            
                31.11
             |                                 
            
                600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                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
             |  
            
                 
             |                                                              
             
    
         
    
    
 |