| 
                 
                    Closing price on 7/24/2013
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    4.40 | 
                 
                
                    | High | 
                    4.40 | 
                 
                
                    | Low | 
                    4.30 | 
                     
                
                    | Volume | 
                    21,800 | 
                                 
                
                    | Split-adjusted Price | 
                    3.69 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
IVS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                7/24/2013
             | 
            
                -0.10 / -2.27%
             |             
            
                4.40
             |           
            
                4.40
             |               
            
                4.30
             |                           
            
                4.30
             | 
            
                4.35
             |                     
            
                3.69
             |                                 
            
                21,800
             |            
            
                 
             |                                       
         
    
        
            | 
                7/23/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.40
             |           
            
                4.40
             |               
            
                4.40
             |                           
            
                4.40
             | 
            
                4.40
             |                     
            
                3.78
             |                                 
            
                37,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/22/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.40
             |           
            
                4.50
             |               
            
                4.40
             |                           
            
                4.40
             | 
            
                4.46
             |                     
            
                3.78
             |                                 
            
                26,600
             |            
            
                 
             |                                       
         
    
        
            | 
                7/19/2013
             | 
            
                -0.10 / -2.22%
             |             
            
                4.50
             |           
            
                4.50
             |               
            
                4.40
             |                           
            
                4.40
             | 
            
                4.49
             |                     
            
                3.78
             |                                 
            
                48,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/18/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.50
             |           
            
                4.50
             |               
            
                4.50
             |                           
            
                4.50
             | 
            
                4.50
             |                     
            
                3.86
             |                                 
            
                47,200
             |            
            
                 
             |                                       
         
    
        
            | 
                7/17/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.50
             |           
            
                4.60
             |               
            
                4.40
             |                           
            
                4.50
             | 
            
                4.47
             |                     
            
                3.86
             |                                 
            
                39,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/16/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.40
             |           
            
                4.50
             |               
            
                4.40
             |                           
            
                4.50
             | 
            
                4.46
             |                     
            
                3.86
             |                                 
            
                34,200
             |            
            
                 
             |                                       
         
    
        
            | 
                7/15/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.50
             |           
            
                4.50
             |               
            
                4.50
             |                           
            
                4.50
             | 
            
                4.50
             |                     
            
                3.86
             |                                 
            
                33,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/12/2013
             | 
            
                +0.10 / +2.27%
             |             
            
                4.40
             |           
            
                4.50
             |               
            
                4.40
             |                           
            
                4.50
             | 
            
                4.41
             |                     
            
                3.86
             |                                 
            
                18,900
             |            
            
                 
             |                                       
         
    
        
            | 
                7/11/2013
             | 
            
                +0.10 / +2.33%
             |             
            
                4.40
             |           
            
                4.40
             |               
            
                4.40
             |                           
            
                4.40
             | 
            
                4.40
             |                     
            
                3.78
             |                                 
            
                25,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/10/2013
             | 
            
                -0.20 / -4.44%
             |             
            
                4.40
             |           
            
                4.40
             |               
            
                4.30
             |                           
            
                4.30
             | 
            
                4.40
             |                     
            
                3.69
             |                                 
            
                30,400
             |            
            
                 
             |                                       
         
    
        
            | 
                7/9/2013
             | 
            
                +0.10 / +2.27%
             |             
            
                4.40
             |           
            
                4.50
             |               
            
                4.40
             |                           
            
                4.50
             | 
            
                4.40
             |                     
            
                3.86
             |                                 
            
                42,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/8/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.40
             |           
            
                4.40
             |               
            
                4.40
             |                           
            
                4.40
             | 
            
                4.40
             |                     
            
                3.78
             |                                 
            
                500
             |            
            
                 
             |                                       
         
    
        
            | 
                7/5/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.40
             |           
            
                4.40
             |               
            
                4.40
             |                           
            
                4.40
             | 
            
                4.40
             |                     
            
                3.78
             |                                 
            
                33,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/4/2013
             | 
            
                +0.10 / +2.33%
             |             
            
                4.40
             |           
            
                4.40
             |               
            
                4.40
             |                           
            
                4.40
             | 
            
                4.40
             |                     
            
                3.78
             |                                 
            
                21,500
             |            
            
                 
             |                                       
         
    
        
            | 
                7/3/2013
             | 
            
                -0.10 / -2.27%
             |             
            
                4.40
             |           
            
                4.50
             |               
            
                4.30
             |                           
            
                4.30
             | 
            
                4.39
             |                     
            
                3.69
             |                                 
            
                13,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/2/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.40
             |           
            
                4.50
             |               
            
                4.40
             |                           
            
                4.40
             | 
            
                4.40
             |                     
            
                3.78
             |                                 
            
                166,200
             |            
            
                 
             |                                       
         
    
        
            | 
                7/1/2013
             | 
            
                -0.10 / -2.22%
             |             
            
                4.40
             |           
            
                4.40
             |               
            
                4.30
             |                           
            
                4.40
             | 
            
                4.40
             |                     
            
                3.78
             |                                 
            
                3,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/28/2013
             | 
            
                +0.10 / +2.27%
             |             
            
                4.50
             |           
            
                4.50
             |               
            
                4.30
             |                           
            
                4.50
             | 
            
                4.40
             |                     
            
                3.86
             |                                 
            
                24,800
             |            
            
                 
             |                                       
         
    
        
            | 
                6/27/2013
             | 
            
                -0.10 / -2.22%
             |             
            
                4.40
             |           
            
                4.50
             |               
            
                4.30
             |                           
            
                4.40
             | 
            
                4.35
             |                     
            
                3.78
             |                                 
            
                61,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/26/2013
             | 
            
                -0.10 / -2.17%
             |             
            
                4.50
             |           
            
                4.50
             |               
            
                4.40
             |                           
            
                4.50
             | 
            
                4.48
             |                     
            
                3.86
             |                                 
            
                99,300
             |            
            
                 
             |                                       
         
    
        
            | 
                6/25/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.60
             |           
            
                4.70
             |               
            
                4.50
             |                           
            
                4.60
             | 
            
                4.54
             |                     
            
                3.95
             |                                 
            
                162,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/24/2013
             | 
            
                -0.20 / -4.17%
             |             
            
                4.80
             |           
            
                4.80
             |               
            
                4.60
             |                           
            
                4.60
             | 
            
                4.64
             |                     
            
                3.95
             |                                 
            
                73,000
             |            
            
                 
             |                                       
         
    
        
            | 
                6/21/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.70
             |           
            
                4.80
             |               
            
                4.70
             |                           
            
                4.80
             | 
            
                4.70
             |                     
            
                4.12
             |                                 
            
                91,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/20/2013
             | 
            
                -0.10 / -2.04%
             |             
            
                4.90
             |           
            
                4.90
             |               
            
                4.70
             |                           
            
                4.80
             | 
            
                4.75
             |                     
            
                4.12
             |                                 
            
                177,600
             |            
            
                 
             |                                       
         
    
        
            | 
                6/19/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.90
             |           
            
                4.90
             |               
            
                4.80
             |                           
            
                4.90
             | 
            
                4.81
             |                     
            
                4.21
             |                                 
            
                133,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/18/2013
             | 
            
                -0.10 / -2.00%
             |             
            
                5.00
             |           
            
                5.00
             |               
            
                4.80
             |                           
            
                4.90
             | 
            
                4.84
             |                     
            
                4.21
             |                                 
            
                113,800
             |            
            
                 
             |                                       
         
    
        
            | 
                6/17/2013
             | 
            
                -0.10 / -1.96%
             |             
            
                5.00
             |           
            
                5.10
             |               
            
                4.90
             |                           
            
                5.00
             | 
            
                4.95
             |                     
            
                4.29
             |                                 
            
                117,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/14/2013
             | 
            
                0.00 / 0.00%
             |             
            
                5.00
             |           
            
                5.10
             |               
            
                5.00
             |                           
            
                5.10
             | 
            
                5.00
             |                     
            
                4.38
             |                                 
            
                111,000
             |            
            
                 
             |                                       
         
    
        
            | 
                6/13/2013
             | 
            
                0.00 / 0.00%
             |             
            
                5.00
             |           
            
                5.10
             |               
            
                5.00
             |                           
            
                5.10
             | 
            
                5.01
             |                     
            
                4.38
             |                                 
            
                131,500
             |  
            
                 
             |                                                              
             
    
         
    
    
 |