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                    Closing price on 5/19/2011
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        |           
                
                    | Open | 21.30 |  
                    | High | 21.30 |  
                    | Low | 20.70 |  
                    | Volume | 35,820 |  
                    | Split-adjusted Price | 2.83 |  
                
             | 
 |  MPC Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 5/19/2011 | -0.60 / -2.82% | 21.30 | 21.30 | 20.70 | 20.70 | 20.70 | 2.83 | 35,820 |   |  
            | 5/18/2011 | -0.20 / -0.93% | 21.50 | 21.50 | 21.30 | 21.30 | 21.30 | 2.91 | 17,000 |   |  			
            | 5/17/2011 | -0.70 / -3.15% | 22.20 | 22.30 | 21.30 | 21.50 | 21.50 | 2.94 | 96,760 |   |  
            | 5/16/2011 | -0.30 / -1.33% | 23.00 | 23.00 | 22.10 | 22.20 | 22.20 | 3.04 | 64,280 |   |  			
            | 5/13/2011 | 0.00 / 0.00% | 23.20 | 23.20 | 22.50 | 22.50 | 22.50 | 3.08 | 30,650 |   |  
            | 5/12/2011 | -0.30 / -1.32% | 23.00 | 23.00 | 22.50 | 22.50 | 22.50 | 3.08 | 52,700 |   |  			
            | 5/11/2011 | -0.50 / -2.15% | 23.40 | 23.40 | 22.60 | 22.80 | 22.80 | 3.12 | 30,170 |   |  
            | 5/10/2011 | -0.10 / -0.43% | 22.70 | 23.70 | 22.50 | 23.30 | 23.30 | 3.19 | 143,300 |   |  			
            | 5/9/2011 | +0.50 / +2.18% | 23.30 | 23.40 | 22.30 | 23.40 | 23.40 | 3.20 | 1,300 |   |  
            | 5/6/2011 | -1.00 / -4.18% | 23.90 | 23.90 | 22.80 | 22.90 | 22.90 | 3.13 | 69,500 |   |  			
            | 5/5/2011 | +0.10 / +0.42% | 24.00 | 24.00 | 22.70 | 23.90 | 23.90 | 3.27 | 153,660 |   |  
            | 5/4/2011 | 0.00 / 0.00% | 23.30 | 23.90 | 23.20 | 23.80 | 23.80 | 3.26 | 3,250 |   |  			
            | 4/29/2011 | 0.00 / 0.00% | 23.80 | 23.80 | 23.60 | 23.80 | 23.80 | 3.26 | 2,130 |   |  
            | 4/28/2011 | -0.30 / -1.24% | 23.70 | 24.40 | 23.70 | 23.80 | 23.80 | 3.26 | 4,130 |   |  			
            | 4/27/2011 | +0.10 / +0.42% | 24.50 | 24.50 | 24.00 | 24.10 | 24.10 | 3.30 | 7,600 |   |  
            | 4/26/2011 | 0.00 / 0.00% | 23.60 | 24.40 | 23.50 | 24.00 | 24.00 | 3.28 | 95,150 |   |  			
            | 4/25/2011 | +1.00 / +4.35% | 23.90 | 24.00 | 23.50 | 24.00 | 24.00 | 3.28 | 74,560 |   |  
            | 4/22/2011 | -1.00 / -4.17% | 24.00 | 24.40 | 23.00 | 23.00 | 23.00 | 3.15 | 18,500 |   |  			
            | 4/21/2011 | -0.30 / -1.23% | 24.20 | 24.40 | 24.00 | 24.00 | 24.00 | 3.28 | 61,780 |   |  
            | 4/20/2011 | +0.30 / +1.25% | 24.90 | 24.90 | 24.00 | 24.30 | 24.30 | 3.32 | 14,510 |   |  			
            | 4/19/2011 | -0.10 / -0.41% | 24.10 | 24.10 | 24.00 | 24.00 | 24.00 | 3.28 | 12,120 |   |  
            | 4/18/2011 | +0.40 / +1.69% | 23.50 | 24.10 | 23.50 | 24.10 | 24.10 | 3.30 | 36,000 |   |  			
            | 4/15/2011 | -0.40 / -1.66% | 23.60 | 24.00 | 23.60 | 23.70 | 23.70 | 3.24 | 7,950 |   |  
            | 4/14/2011 | 0.00 / 0.00% | 23.90 | 24.30 | 23.90 | 24.10 | 24.10 | 3.30 | 5,750 |   |  			
            | 4/13/2011 | -0.40 / -1.63% | 24.50 | 24.50 | 24.00 | 24.10 | 24.10 | 3.30 | 4,020 |   |  
            | 4/8/2011 | 0.00 / 0.00% | 24.50 | 24.50 | 23.70 | 24.50 | 24.50 | 3.35 | 3,440 |   |  			
            | 4/7/2011 | +0.70 / +2.94% | 24.90 | 24.90 | 24.50 | 24.50 | 24.50 | 3.35 | 39,800 |   |  
            | 4/6/2011 | +1.10 / +4.85% | 23.80 | 23.80 | 23.80 | 23.80 | 23.80 | 3.26 | 21,830 |   |  			
            | 4/5/2011 | -1.10 / -4.62% | 23.80 | 23.90 | 22.70 | 22.70 | 22.70 | 3.11 | 13,110 |   |  
            | 4/4/2011 | +0.40 / +1.71% | 23.40 | 23.80 | 23.40 | 23.80 | 23.80 | 3.26 | 39,550 |   |  |