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            | 
                    Closing price on 2/22/2012
                 |  |  
    
        |           
                
                    | Open | 5.20 |  
                    | High | 5.80 |  
                    | Low | 5.20 |  
                    | Volume | 156,300 |  
                    | Split-adjusted Price | 4.55 |  
                
             | 
 |  IVS Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 2/22/2012 | +0.30 / +6.00% | 5.20 | 5.80 | 5.20 | 5.30 | 5.69 | 4.55 | 156,300 |   |  
            | 2/21/2012 | 0.00 / 0.00% | 5.20 | 5.60 | 5.00 | 5.00 | 5.47 | 4.29 | 115,000 |   |  			
            | 2/20/2012 | +0.20 / +4.17% | 4.90 | 5.30 | 4.90 | 5.00 | 5.26 | 4.29 | 233,600 |   |  
            | 2/17/2012 | +0.40 / +9.09% | 4.70 | 5.10 | 4.60 | 4.80 | 4.98 | 4.12 | 134,300 |   |  			
            | 2/16/2012 | +0.20 / +4.76% | 4.60 | 5.00 | 4.40 | 4.40 | 4.81 | 3.78 | 93,600 |   |  
            | 2/15/2012 | -0.30 / -6.67% | 4.40 | 4.80 | 4.20 | 4.20 | 4.70 | 3.61 | 77,400 |   |  			
            | 2/14/2012 | 0.00 / 0.00% | 4.50 | 4.50 | 4.50 | 4.50 | 4.50 | 3.86 | 300 |   |  
            | 2/13/2012 | -0.10 / -2.17% | 4.50 | 4.90 | 4.40 | 4.50 | 4.80 | 3.86 | 108,700 |   |  			
            | 2/10/2012 | 0.00 / 0.00% | 4.60 | 4.60 | 4.60 | 4.60 | 4.60 | 3.95 | 100 |   |  
            | 2/9/2012 | -0.30 / -6.12% | 4.80 | 5.00 | 4.60 | 4.60 | 4.90 | 3.95 | 22,000 |   |  			
            | 2/8/2012 | +0.40 / +8.89% | 4.60 | 4.90 | 4.60 | 4.90 | 4.86 | 4.21 | 86,100 |   |  
            | 2/7/2012 | -0.10 / -2.17% | 4.80 | 5.00 | 4.50 | 4.50 | 4.87 | 3.86 | 17,000 |   |  			
            | 2/6/2012 | +0.10 / +2.22% | 4.70 | 4.80 | 4.60 | 4.60 | 4.78 | 3.95 | 25,200 |   |  
            | 2/3/2012 | +0.30 / +7.14% | 4.50 | 4.50 | 4.50 | 4.50 | 4.50 | 3.86 | 100 |   |  			
            | 2/2/2012 | +0.10 / +2.44% | 4.10 | 4.30 | 4.10 | 4.20 | 4.29 | 3.61 | 20,700 |   |  
            | 2/1/2012 | -0.40 / -8.89% | 4.10 | 4.10 | 4.10 | 4.10 | 4.10 | 3.52 | 1,000 |   |  			
            | 1/31/2012 | -0.10 / -2.17% | 4.20 | 4.50 | 4.20 | 4.50 | 4.37 | 3.86 | 15,000 |   |  
            | 1/30/2012 | +0.20 / +4.55% | 4.30 | 4.60 | 4.30 | 4.60 | 4.52 | 3.95 | 20,700 |   |  			
            | 1/20/2012 | +0.20 / +4.76% | 4.20 | 4.40 | 4.00 | 4.40 | 4.27 | 3.78 | 59,100 |   |  
            | 1/19/2012 | 0.00 / 0.00% | 4.10 | 4.20 | 4.10 | 4.20 | 4.18 | 3.61 | 93,000 |   |  			
            | 1/18/2012 | 0.00 / 0.00% | 4.20 | 4.20 | 4.00 | 4.20 | 4.13 | 3.61 | 5,500 |   |  
            | 1/17/2012 | +0.20 / +5.00% | 4.10 | 4.20 | 4.10 | 4.20 | 4.15 | 3.61 | 2,000 |   |  			
            | 1/16/2012 | +0.10 / +2.56% | 4.00 | 4.10 | 4.00 | 4.00 | 4.04 | 3.43 | 7,100 |   |  
            | 1/13/2012 | -0.20 / -4.88% | 4.00 | 4.10 | 3.80 | 3.90 | 3.94 | 3.35 | 10,900 |   |  			
            | 1/12/2012 | +0.10 / +2.50% | 3.80 | 4.10 | 3.80 | 4.10 | 3.93 | 3.52 | 20,200 |   |  
            | 1/11/2012 | 0.00 / 0.00% | 4.20 | 4.20 | 3.80 | 4.00 | 4.00 | 3.43 | 3,900 |   |  			
            | 1/10/2012 | -0.30 / -6.98% | 4.00 | 4.20 | 4.00 | 4.00 | 4.01 | 3.43 | 314,900 |   |  
            | 1/9/2012 | +0.10 / +2.38% | 4.30 | 4.30 | 4.30 | 4.30 | 4.30 | 3.69 | 100 |   |  			
            | 1/6/2012 | 0.00 / 0.00% | 4.20 | 4.20 | 4.20 | 4.20 | 4.20 | 3.61 | 0 |   |  
            | 1/5/2012 | 0.00 / 0.00% | 4.20 | 4.20 | 4.20 | 4.20 | 4.20 | 3.61 | 0 |   |  |