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                    Closing price on 5/15/2008
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        |           
                
                    | Open | 70.50 |  
                    | High | 70.50 |  
                    | Low | 70.50 |  
                    | Volume | 1,200 |  
                    | Split-adjusted Price | 13.78 |  
                
             | 
 |  DQC Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 5/15/2008 | -1.00 / -1.40% | 70.50 | 70.50 | 70.50 | 70.50 | 70.50 | 13.78 | 1,200 |   |  
            | 5/14/2008 | -1.00 / -1.38% | 71.50 | 71.50 | 71.50 | 71.50 | 71.50 | 13.98 | 290 |   |  			
            | 5/13/2008 | -1.00 / -1.36% | 72.50 | 72.50 | 72.50 | 72.50 | 72.50 | 14.17 | 100 |   |  
            | 5/12/2008 | -1.50 / -2.00% | 73.50 | 73.50 | 73.50 | 73.50 | 73.50 | 14.37 | 3,010 |   |  			
            | 5/9/2008 | -1.50 / -1.96% | 75.00 | 75.00 | 75.00 | 75.00 | 75.00 | 14.66 | 8,590 |   |  
            | 5/8/2008 | -1.50 / -1.92% | 76.50 | 76.50 | 76.50 | 76.50 | 76.50 | 14.96 | 10,440 |   |  			
            | 5/7/2008 | -1.50 / -1.89% | 81.00 | 81.00 | 78.00 | 78.00 | 78.00 | 15.25 | 256,060 |   |  
            | 5/6/2008 | +1.50 / +1.92% | 79.50 | 79.50 | 79.50 | 79.50 | 79.50 | 15.54 | 6,970 |   |  			
            | 5/5/2008 | +1.50 / +1.96% | 76.00 | 78.00 | 76.00 | 78.00 | 78.00 | 15.25 | 48,050 |   |  
            | 4/29/2008 | -1.50 / -1.92% | 76.50 | 78.00 | 76.50 | 76.50 | 76.50 | 14.96 | 108,680 |   |  			
            | 4/28/2008 | -1.50 / -1.89% | 78.00 | 78.00 | 78.00 | 78.00 | 78.00 | 15.25 | 80,690 |   |  
            | 4/25/2008 | -1.50 / -1.85% | 79.50 | 79.50 | 79.50 | 79.50 | 79.50 | 15.54 | 3,290 |   |  			
            | 4/24/2008 | -1.50 / -1.82% | 81.00 | 81.00 | 81.00 | 81.00 | 81.00 | 15.84 | 4,590 |   |  
            | 4/23/2008 | -1.50 / -1.79% | 82.50 | 82.50 | 82.50 | 82.50 | 82.50 | 16.13 | 230 |   |  			
            | 4/22/2008 | -1.50 / -1.75% | 84.00 | 84.00 | 84.00 | 84.00 | 84.00 | 16.42 | 240 |   |  
            | 4/21/2008 | -1.50 / -1.72% | 85.50 | 85.50 | 85.50 | 85.50 | 85.50 | 16.72 | 10,880 |   |  			
            | 4/18/2008 | -1.50 / -1.69% | 87.00 | 87.00 | 87.00 | 87.00 | 87.00 | 17.01 | 42,210 |   |  
            | 4/17/2008 | -1.50 / -1.67% | 88.50 | 91.50 | 88.50 | 88.50 | 88.50 | 17.30 | 122,100 |   |  			
            | 4/16/2008 | -1.50 / -1.64% | 90.00 | 90.00 | 90.00 | 90.00 | 90.00 | 17.60 | 1,520 |   |  
            | 4/11/2008 | -1.50 / -1.61% | 91.50 | 91.50 | 91.50 | 91.50 | 91.50 | 17.89 | 11,200 |   |  			
            | 4/10/2008 | -1.50 / -1.59% | 93.00 | 93.00 | 93.00 | 93.00 | 93.00 | 18.18 | 6,850 |   |  
            | 4/9/2008 | -1.50 / -1.56% | 94.50 | 94.50 | 94.50 | 94.50 | 94.50 | 18.48 | 37,650 |   |  			
            | 4/8/2008 | -1.50 / -1.54% | 97.50 | 97.50 | 96.00 | 96.00 | 96.00 | 18.77 | 142,740 |   |  
            | 4/7/2008 | +1.50 / +1.56% | 97.50 | 97.50 | 96.00 | 97.50 | 97.50 | 19.06 | 268,400 |   |  			
            | 4/4/2008 | +0.50 / +0.52% | 96.00 | 96.00 | 96.00 | 96.00 | 96.00 | 18.77 | 1,500 |   |  
            | 4/3/2008 | +0.50 / +0.53% | 95.50 | 95.50 | 95.50 | 95.50 | 95.50 | 18.67 | 2,000 |   |  			
            | 4/2/2008 | +0.50 / +0.53% | 95.00 | 95.00 | 95.00 | 95.00 | 95.00 | 18.57 | 5,900 |   |  
            | 4/1/2008 | +0.50 / +0.53% | 94.50 | 94.50 | 94.50 | 94.50 | 94.50 | 18.48 | 5,700 |   |  			
            | 3/31/2008 | +0.50 / +0.53% | 94.00 | 94.00 | 94.00 | 94.00 | 94.00 | 18.38 | 6,390 |   |  
            | 3/28/2008 | +0.50 / +0.54% | 93.50 | 93.50 | 93.50 | 93.50 | 93.50 | 18.28 | 75,820 |   |  |