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                    Closing price on 12/16/2011
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        |           
                
                    | Open | 4.50 |  
                    | High | 4.60 |  
                    | Low | 4.20 |  
                    | Volume | 59,000 |  
                    | Split-adjusted Price | 3.69 |  
                
             | 
 |  IVS Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 12/16/2011 | 0.00 / 0.00% | 4.50 | 4.60 | 4.20 | 4.30 | 4.52 | 3.69 | 59,000 |   |  
            | 12/15/2011 | +0.30 / +7.50% | 4.30 | 4.30 | 4.30 | 4.30 | 4.30 | 3.69 | 3,100 |   |  			
            | 12/14/2011 | -0.20 / -4.76% | 4.30 | 4.30 | 4.00 | 4.00 | 4.25 | 3.43 | 52,900 |   |  
            | 12/13/2011 | -0.20 / -4.55% | 4.20 | 4.30 | 4.20 | 4.20 | 4.26 | 3.61 | 71,800 |   |  			
            | 12/12/2011 | -0.20 / -4.35% | 4.40 | 4.50 | 4.40 | 4.40 | 4.49 | 3.78 | 44,400 |   |  
            | 12/9/2011 | -0.30 / -6.12% | 4.60 | 4.70 | 4.60 | 4.60 | 4.68 | 3.95 | 40,300 |   |  			
            | 12/8/2011 | -0.10 / -2.00% | 4.90 | 4.90 | 4.90 | 4.90 | 4.90 | 4.21 | 200 |   |  
            | 12/7/2011 | -0.30 / -5.66% | 5.20 | 5.20 | 5.00 | 5.00 | 5.20 | 4.29 | 24,000 |   |  			
            | 12/6/2011 | +0.20 / +3.92% | 5.20 | 5.30 | 5.20 | 5.30 | 5.30 | 4.55 | 44,000 |   |  
            | 12/5/2011 | +0.30 / +6.25% | 4.80 | 5.10 | 4.80 | 5.10 | 5.05 | 4.38 | 253,300 |   |  			
            | 12/2/2011 | +0.50 / +11.63% | 4.70 | 4.80 | 4.70 | 4.80 | 4.79 | 4.12 | 83,000 |   |  
            | 12/1/2011 | +0.10 / +2.38% | 4.80 | 4.90 | 4.30 | 4.30 | 4.70 | 3.69 | 106,300 |   |  			
            | 11/30/2011 | +0.20 / +5.00% | 4.40 | 4.60 | 4.20 | 4.20 | 4.58 | 3.61 | 78,900 |   |  
            | 11/29/2011 | +0.10 / +2.56% | 4.10 | 4.30 | 4.00 | 4.00 | 4.27 | 3.43 | 87,000 |   |  			
            | 11/28/2011 | -0.20 / -4.88% | 4.10 | 4.30 | 3.90 | 3.90 | 4.08 | 3.35 | 46,700 |   |  
            | 11/25/2011 | -0.10 / -2.38% | 4.00 | 4.10 | 4.00 | 4.10 | 4.08 | 3.52 | 30,800 |   |  			
            | 11/24/2011 | -0.10 / -2.33% | 4.30 | 4.30 | 4.20 | 4.20 | 4.30 | 3.61 | 24,300 |   |  
            | 11/23/2011 | +0.20 / +4.88% | 4.20 | 4.30 | 3.90 | 4.30 | 4.17 | 3.69 | 45,700 |   |  			
            | 11/22/2011 | 0.00 / 0.00% | 4.10 | 4.10 | 4.10 | 4.10 | 4.10 | 3.52 | 700 |   |  
            | 11/21/2011 | -0.30 / -6.82% | 4.40 | 4.40 | 4.10 | 4.10 | 4.37 | 3.52 | 31,300 |   |  			
            | 11/18/2011 | -0.20 / -4.35% | 4.40 | 4.40 | 4.40 | 4.40 | 4.40 | 3.78 | 200 |   |  
            | 11/17/2011 | +0.10 / +2.22% | 4.60 | 4.70 | 4.60 | 4.60 | 4.70 | 3.95 | 50,400 |   |  			
            | 11/16/2011 | +0.10 / +2.27% | 4.60 | 4.70 | 4.50 | 4.50 | 4.64 | 3.86 | 64,100 |   |  
            | 11/15/2011 | +0.10 / +2.33% | 4.40 | 4.60 | 4.30 | 4.40 | 4.57 | 3.78 | 49,300 |   |  			
            | 11/14/2011 | -0.20 / -4.44% | 4.60 | 4.60 | 4.30 | 4.30 | 4.30 | 3.69 | 15,200 |   |  
            | 11/11/2011 | 0.00 / 0.00% | 4.70 | 4.70 | 4.50 | 4.50 | 4.55 | 3.86 | 7,800 |   |  			
            | 11/10/2011 | -0.30 / -6.25% | 4.90 | 4.90 | 4.50 | 4.50 | 4.83 | 3.86 | 67,100 |   |  
            | 11/9/2011 | -0.10 / -2.04% | 5.00 | 5.00 | 4.60 | 4.80 | 4.72 | 4.12 | 3,300 |   |  			
            | 11/8/2011 | -0.10 / -2.00% | 4.70 | 4.90 | 4.70 | 4.90 | 4.86 | 4.21 | 56,600 |   |  
            | 11/7/2011 | 0.00 / 0.00% | 5.00 | 5.00 | 5.00 | 5.00 | 5.00 | 4.29 | 500 |   |  |