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                    Closing price on 5/5/2011
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        |           
                
                    | Open | 24.00 |  
                    | High | 24.00 |  
                    | Low | 22.70 |  
                    | Volume | 153,660 |  
                    | Split-adjusted Price | 3.27 |  
                
             | 
 |  MPC Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 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 |   |  			
            | 4/1/2011 | -0.10 / -0.43% | 23.70 | 23.90 | 23.40 | 23.40 | 23.40 | 3.20 | 10,840 |   |  
            | 3/31/2011 | +0.10 / +0.43% | 23.90 | 24.00 | 23.50 | 23.50 | 23.50 | 3.22 | 53,600 |   |  			
            | 3/30/2011 | -0.60 / -2.50% | 23.50 | 24.20 | 23.10 | 23.40 | 23.40 | 3.20 | 260,830 |   |  
            | 3/29/2011 | -0.80 / -3.23% | 24.10 | 24.10 | 24.00 | 24.00 | 24.00 | 3.28 | 24,190 |   |  			
            | 3/28/2011 | +0.70 / +2.90% | 24.10 | 24.80 | 23.70 | 24.80 | 24.80 | 3.39 | 291,430 |   |  
            | 3/25/2011 | -0.90 / -3.60% | 24.50 | 24.50 | 24.00 | 24.10 | 24.10 | 3.30 | 121,200 |   |  			
            | 3/24/2011 | 0.00 / 0.00% | 24.90 | 25.00 | 24.40 | 25.00 | 25.00 | 3.42 | 45,480 |   |  
            | 3/23/2011 | -1.00 / -3.85% | 26.00 | 26.00 | 25.00 | 25.00 | 25.00 | 3.42 | 26,400 |   |  			
            | 3/22/2011 | +0.30 / +1.17% | 26.90 | 26.90 | 25.00 | 26.00 | 26.00 | 3.56 | 33,230 |   |  
            | 3/21/2011 | +0.70 / +2.80% | 24.80 | 25.80 | 24.80 | 25.70 | 25.70 | 3.52 | 42,490 |   |  |