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                    Closing price on 3/31/2011
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        |           
                
                    | Open | 23.90 |  
                    | High | 24.00 |  
                    | Low | 23.50 |  
                    | Volume | 53,600 |  
                    | Split-adjusted Price | 3.22 |  
                
             | 
 |  MPC Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 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 |   |  
            | 3/18/2011 | -0.70 / -2.72% | 25.00 | 25.00 | 24.80 | 25.00 | 25.00 | 3.42 | 10,020 |   |  			
            | 3/17/2011 | +1.10 / +4.47% | 24.50 | 25.70 | 24.00 | 25.70 | 25.70 | 3.52 | 112,840 |   |  
            | 3/16/2011 | -0.90 / -3.53% | 25.50 | 25.50 | 24.60 | 24.60 | 24.60 | 3.37 | 33,870 |   |  			
            | 3/15/2011 | -0.90 / -3.41% | 25.70 | 25.70 | 25.50 | 25.50 | 25.50 | 3.49 | 11,200 |   |  
            | 3/14/2011 | -0.10 / -0.38% | 26.90 | 26.90 | 25.40 | 26.40 | 26.40 | 3.61 | 3,910 |   |  			
            | 3/11/2011 | -0.50 / -1.85% | 27.50 | 27.50 | 26.00 | 26.50 | 26.50 | 3.63 | 42,550 |   |  
            | 3/10/2011 | +1.00 / +3.85% | 26.00 | 27.00 | 25.00 | 27.00 | 27.00 | 3.69 | 172,480 |   |  			
            | 3/9/2011 | -1.30 / -4.76% | 27.40 | 27.40 | 26.00 | 26.00 | 26.00 | 3.56 | 221,740 |   |  
            | 3/8/2011 | +0.80 / +3.02% | 27.30 | 27.40 | 26.60 | 27.30 | 27.30 | 3.74 | 31,490 |   |  			
            | 3/7/2011 | +0.30 / +1.15% | 26.20 | 27.40 | 25.50 | 26.50 | 26.50 | 3.63 | 102,150 |   |  
            | 3/4/2011 | 0.00 / 0.00% | 25.00 | 26.20 | 25.00 | 26.20 | 26.20 | 3.58 | 127,390 |   |  			
            | 3/3/2011 | -0.30 / -1.13% | 25.20 | 26.30 | 25.20 | 26.20 | 26.20 | 3.58 | 469,600 |   |  
            | 3/2/2011 | 0.00 / 0.00% | 26.50 | 26.50 | 25.20 | 26.50 | 26.50 | 3.63 | 184,150 |   |  			
            | 3/1/2011 | -0.20 / -0.75% | 27.30 | 27.30 | 25.70 | 26.50 | 26.50 | 3.63 | 79,480 |   |  
            | 2/28/2011 | +0.80 / +3.09% | 25.50 | 26.70 | 25.50 | 26.70 | 26.70 | 3.65 | 9,660 |   |  			
            | 2/25/2011 | +1.10 / +4.44% | 26.00 | 26.00 | 25.00 | 25.90 | 25.90 | 3.54 | 2,860 |   |  
            | 2/24/2011 | -0.10 / -0.40% | 25.00 | 25.00 | 24.20 | 24.80 | 24.80 | 3.39 | 8,020 |   |  			
            | 2/23/2011 | +0.60 / +2.47% | 24.00 | 25.50 | 24.00 | 24.90 | 24.90 | 3.41 | 5,820 |   |  
            | 2/22/2011 | -1.10 / -4.33% | 25.00 | 25.30 | 24.30 | 24.30 | 24.30 | 3.32 | 9,920 |   |  			
            | 2/21/2011 | -1.30 / -4.87% | 25.60 | 25.60 | 25.40 | 25.40 | 25.40 | 3.48 | 22,030 |   |  
            | 2/18/2011 | -0.90 / -3.26% | 27.60 | 27.60 | 26.70 | 26.70 | 26.70 | 3.65 | 8,850 |   |  |