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                    Closing price on 5/20/2014
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        |           
                
                    | Open | 3.50 |  
                    | High | 3.70 |  
                    | Low | 3.40 |  
                    | Volume | 208,690 |  
                    | Split-adjusted Price | 3.44 |  
                
             | 
 |  VOS Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 5/20/2014 | +0.20 / +5.71% | 3.50 | 3.70 | 3.40 | 3.70 | 3.70 | 3.44 | 208,690 |   |  
            | 5/19/2014 | +0.10 / +2.94% | 3.50 | 3.50 | 3.30 | 3.50 | 3.50 | 3.26 | 130,330 |   |  			
            | 5/16/2014 | 0.00 / 0.00% | 3.40 | 3.50 | 3.30 | 3.40 | 3.40 | 3.16 | 41,970 |   |  
            | 5/15/2014 | -0.10 / -2.86% | 3.60 | 3.70 | 3.30 | 3.40 | 3.40 | 3.16 | 386,670 |   |  			
            | 5/14/2014 | +0.10 / +2.94% | 3.30 | 3.60 | 3.20 | 3.50 | 3.50 | 3.26 | 216,610 |   |  
            | 5/13/2014 | -0.20 / -5.56% | 3.40 | 3.60 | 3.40 | 3.40 | 3.40 | 3.16 | 450,260 |   |  			
            | 5/12/2014 | -0.20 / -5.26% | 3.70 | 3.70 | 3.60 | 3.60 | 3.60 | 3.35 | 215,310 |   |  
            | 5/9/2014 | +0.10 / +2.70% | 3.60 | 3.80 | 3.60 | 3.80 | 3.80 | 3.54 | 257,430 |   |  			
            | 5/8/2014 | -0.20 / -5.13% | 3.70 | 3.80 | 3.70 | 3.70 | 3.70 | 3.44 | 1,123,390 |   |  
            | 5/7/2014 | +0.10 / +2.63% | 3.80 | 4.00 | 3.80 | 3.90 | 3.90 | 3.63 | 146,910 |   |  			
            | 5/6/2014 | -0.20 / -5.00% | 4.00 | 4.00 | 3.80 | 3.80 | 3.80 | 3.54 | 504,800 |   |  
            | 5/5/2014 | -0.30 / -6.98% | 4.30 | 4.30 | 4.00 | 4.00 | 4.00 | 3.72 | 745,440 |   |  			
            | 4/29/2014 | 0.00 / 0.00% | 4.30 | 4.40 | 4.20 | 4.30 | 4.30 | 4.00 | 114,150 |   |  
            | 4/28/2014 | +0.10 / +2.38% | 4.20 | 4.40 | 4.20 | 4.30 | 4.30 | 4.00 | 461,620 |   |  			
            | 4/25/2014 | +0.10 / +2.44% | 4.20 | 4.30 | 4.20 | 4.20 | 4.20 | 3.91 | 223,920 |   |  
            | 4/24/2014 | 0.00 / 0.00% | 4.10 | 4.20 | 4.00 | 4.10 | 4.10 | 3.82 | 106,370 |   |  			
            | 4/23/2014 | -0.10 / -2.38% | 4.20 | 4.30 | 4.00 | 4.10 | 4.10 | 3.82 | 418,710 |   |  
            | 4/22/2014 | 0.00 / 0.00% | 4.30 | 4.30 | 4.00 | 4.20 | 4.20 | 3.91 | 486,760 |   |  			
            | 4/21/2014 | 0.00 / 0.00% | 4.20 | 4.40 | 4.20 | 4.20 | 4.20 | 3.91 | 305,990 |   |  
            | 4/18/2014 | -0.20 / -4.55% | 4.40 | 4.40 | 4.10 | 4.20 | 4.20 | 3.91 | 587,040 |   |  			
            | 4/17/2014 | +0.20 / +4.76% | 4.30 | 4.40 | 4.30 | 4.40 | 4.40 | 4.10 | 524,940 |   |  
            | 4/16/2014 | -0.30 / -6.67% | 4.40 | 4.50 | 4.20 | 4.20 | 4.20 | 3.91 | 1,527,500 |   |  			
            | 4/15/2014 | -0.30 / -6.25% | 4.70 | 4.80 | 4.50 | 4.50 | 4.50 | 4.19 | 876,420 |   |  
            | 4/14/2014 | -0.30 / -5.88% | 5.00 | 5.10 | 4.80 | 4.80 | 4.80 | 4.47 | 1,032,120 |   |  			
            | 4/11/2014 | +0.20 / +4.08% | 4.90 | 5.20 | 4.70 | 5.10 | 5.10 | 4.75 | 1,671,230 |   |  
            | 4/10/2014 | +0.30 / +6.52% | 4.70 | 4.90 | 4.70 | 4.90 | 4.90 | 4.56 | 1,250,940 |   |  			
            | 4/8/2014 | +0.30 / +6.98% | 4.30 | 4.60 | 4.30 | 4.60 | 4.60 | 4.28 | 2,787,100 |   |  
            | 4/7/2014 | 0.00 / 0.00% | 4.40 | 4.50 | 4.00 | 4.30 | 4.30 | 4.00 | 929,090 |   |  			
            | 4/4/2014 | 0.00 / 0.00% | 4.30 | 4.50 | 4.30 | 4.30 | 4.30 | 4.00 | 759,340 |   |  
            | 4/3/2014 | 0.00 / 0.00% | 4.20 | 4.40 | 4.10 | 4.30 | 4.30 | 4.00 | 738,700 |   |  |