| 
                 
                    Closing price on 4/29/2020
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    52.20 | 
                 
                
                    | High | 
                    52.20 | 
                 
                
                    | Low | 
                    51.10 | 
                     
                
                    | Volume | 
                    3,200 | 
                                 
                
                    | Split-adjusted Price | 
                    31.69 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
SLS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                4/29/2020
             | 
            
                -1.10 / -2.11%
             |             
            
                52.20
             |           
            
                52.20
             |               
            
                51.10
             |                           
            
                51.10
             | 
            
                52.08
             |                     
            
                31.69
             |                                 
            
                3,200
             |            
            
                 
             |                                       
         
    
        
            | 
                4/28/2020
             | 
            
                +3.70 / +7.63%
             |             
            
                49.20
             |           
            
                52.50
             |               
            
                48.00
             |                           
            
                52.20
             | 
            
                49.86
             |                     
            
                32.38
             |                                 
            
                32,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/27/2020
             | 
            
                -0.50 / -1.02%
             |             
            
                49.20
             |           
            
                49.20
             |               
            
                48.50
             |                           
            
                48.50
             | 
            
                49.02
             |                     
            
                30.08
             |                                 
            
                6,600
             |            
            
                 
             |                                       
         
    
        
            | 
                4/24/2020
             | 
            
                -0.70 / -1.41%
             |             
            
                49.40
             |           
            
                49.40
             |               
            
                49.00
             |                           
            
                49.00
             | 
            
                49.13
             |                     
            
                30.39
             |                                 
            
                5,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/23/2020
             | 
            
                +0.20 / +0.40%
             |             
            
                49.90
             |           
            
                49.90
             |               
            
                49.00
             |                           
            
                49.70
             | 
            
                49.41
             |                     
            
                30.82
             |                                 
            
                5,900
             |            
            
                 
             |                                       
         
    
        
            | 
                4/22/2020
             | 
            
                -0.50 / -1.00%
             |             
            
                50.00
             |           
            
                50.00
             |               
            
                49.00
             |                           
            
                49.50
             | 
            
                49.44
             |                     
            
                30.70
             |                                 
            
                3,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/21/2020
             | 
            
                +2.40 / +5.04%
             |             
            
                48.10
             |           
            
                51.90
             |               
            
                48.00
             |                           
            
                50.00
             | 
            
                50.26
             |                     
            
                31.01
             |                                 
            
                17,200
             |            
            
                 
             |                                       
         
    
        
            | 
                4/20/2020
             | 
            
                +0.10 / +0.21%
             |             
            
                48.00
             |           
            
                48.50
             |               
            
                47.50
             |                           
            
                47.60
             | 
            
                47.96
             |                     
            
                29.52
             |                                 
            
                4,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/17/2020
             | 
            
                +2.00 / +4.40%
             |             
            
                45.70
             |           
            
                47.50
             |               
            
                45.70
             |                           
            
                47.50
             | 
            
                46.80
             |                     
            
                29.46
             |                                 
            
                5,700
             |            
            
                 
             |                                       
         
    
        
            | 
                4/16/2020
             | 
            
                -0.50 / -1.09%
             |             
            
                46.00
             |           
            
                46.00
             |               
            
                45.50
             |                           
            
                45.50
             | 
            
                45.89
             |                     
            
                28.22
             |                                 
            
                3,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/15/2020
             | 
            
                +0.20 / +0.44%
             |             
            
                41.40
             |           
            
                46.00
             |               
            
                41.40
             |                           
            
                46.00
             | 
            
                44.93
             |                     
            
                28.53
             |                                 
            
                1,200
             |            
            
                 
             |                                       
         
    
        
            | 
                4/14/2020
             | 
            
                0.00 / 0.00%
             |             
            
                45.80
             |           
            
                45.80
             |               
            
                45.80
             |                           
            
                45.80
             | 
            
                45.80
             |                     
            
                28.41
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/13/2020
             | 
            
                -2.20 / -4.58%
             |             
            
                43.30
             |           
            
                46.60
             |               
            
                43.30
             |                           
            
                45.80
             | 
            
                44.32
             |                     
            
                28.41
             |                                 
            
                11,100
             |            
            
                 
             |                                       
         
    
        
            | 
                4/10/2020
             | 
            
                +0.60 / +1.27%
             |             
            
                48.00
             |           
            
                48.00
             |               
            
                48.00
             |                           
            
                48.00
             | 
            
                48.00
             |                     
            
                29.77
             |                                 
            
                100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/9/2020
             | 
            
                +0.20 / +0.42%
             |             
            
                43.60
             |           
            
                48.50
             |               
            
                43.60
             |                           
            
                47.40
             | 
            
                45.77
             |                     
            
                29.40
             |                                 
            
                2,000
             |            
            
                 
             |                                       
         
    
        
            | 
                4/8/2020
             | 
            
                +3.70 / +8.51%
             |             
            
                43.00
             |           
            
                47.20
             |               
            
                43.00
             |                           
            
                47.20
             | 
            
                43.97
             |                     
            
                29.27
             |                                 
            
                2,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/7/2020
             | 
            
                +0.70 / +1.64%
             |             
            
                40.00
             |           
            
                44.50
             |               
            
                40.00
             |                           
            
                43.50
             | 
            
                42.88
             |                     
            
                26.98
             |                                 
            
                4,400
             |            
            
                 
             |                                       
         
    
        
            | 
                4/6/2020
             | 
            
                +0.80 / +1.90%
             |             
            
                45.00
             |           
            
                45.00
             |               
            
                42.80
             |                           
            
                42.80
             | 
            
                43.90
             |                     
            
                26.55
             |                                 
            
                200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/3/2020
             | 
            
                +0.50 / +1.20%
             |             
            
                41.60
             |           
            
                42.00
             |               
            
                41.50
             |                           
            
                42.00
             | 
            
                41.82
             |                     
            
                26.05
             |                                 
            
                2,400
             |            
            
                 
             |                                       
         
    
        
            | 
                4/1/2020
             | 
            
                +0.50 / +1.22%
             |             
            
                37.10
             |           
            
                41.50
             |               
            
                37.10
             |                           
            
                41.50
             | 
            
                41.12
             |                     
            
                25.74
             |                                 
            
                2,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/31/2020
             | 
            
                0.00 / 0.00%
             |             
            
                41.00
             |           
            
                41.00
             |               
            
                41.00
             |                           
            
                41.00
             | 
            
                41.00
             |                     
            
                25.43
             |                                 
            
                1,300
             |            
            
                 
             |                                       
         
    
        
            | 
                3/30/2020
             | 
            
                -1.00 / -2.38%
             |             
            
                42.00
             |           
            
                42.00
             |               
            
                40.30
             |                           
            
                41.00
             | 
            
                41.47
             |                     
            
                25.43
             |                                 
            
                2,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/27/2020
             | 
            
                0.00 / 0.00%
             |             
            
                42.50
             |           
            
                42.50
             |               
            
                42.00
             |                           
            
                42.00
             | 
            
                42.04
             |                     
            
                26.05
             |                                 
            
                3,400
             |            
            
                 
             |                                       
         
    
        
            | 
                3/26/2020
             | 
            
                -1.50 / -3.45%
             |             
            
                43.00
             |           
            
                43.00
             |               
            
                42.00
             |                           
            
                42.00
             | 
            
                42.19
             |                     
            
                26.05
             |                                 
            
                2,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/25/2020
             | 
            
                +3.40 / +8.48%
             |             
            
                41.60
             |           
            
                43.50
             |               
            
                41.50
             |                           
            
                43.50
             | 
            
                42.47
             |                     
            
                26.98
             |                                 
            
                2,000
             |            
            
                 
             |                                       
         
    
        
            | 
                3/24/2020
             | 
            
                +0.10 / +0.25%
             |             
            
                40.00
             |           
            
                40.20
             |               
            
                40.00
             |                           
            
                40.10
             | 
            
                40.06
             |                     
            
                24.87
             |                                 
            
                1,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/23/2020
             | 
            
                -3.10 / -7.19%
             |             
            
                43.10
             |           
            
                44.40
             |               
            
                40.00
             |                           
            
                40.00
             | 
            
                42.15
             |                     
            
                24.81
             |                                 
            
                5,800
             |            
            
                 
             |                                       
         
    
        
            | 
                3/20/2020
             | 
            
                -1.00 / -2.27%
             |             
            
                42.60
             |           
            
                44.90
             |               
            
                42.60
             |                           
            
                43.10
             | 
            
                43.28
             |                     
            
                26.73
             |                                 
            
                1,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/19/2020
             | 
            
                +0.60 / +1.38%
             |             
            
                43.60
             |           
            
                44.10
             |               
            
                43.60
             |                           
            
                44.10
             | 
            
                43.64
             |                     
            
                27.35
             |                                 
            
                3,100
             |            
            
                 
             |                                       
         
    
        
            | 
                3/18/2020
             | 
            
                -2.10 / -4.61%
             |             
            
                46.00
             |           
            
                48.00
             |               
            
                43.50
             |                           
            
                43.50
             | 
            
                45.34
             |                     
            
                26.98
             |                                 
            
                5,300
             |  
            
                 
             |                                                              
             
    
         
    
    
 |