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            | 
                    Closing price on 9/22/2011
                 |  |  
    
        |           
                
                    | Open | 23.30 |  
                    | High | 23.80 |  
                    | Low | 23.30 |  
                    | Volume | 14,970 |  
                    | Split-adjusted Price | 3.23 |  
                
             | 
 |  MPC Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 9/22/2011 | -0.40 / -1.67% | 23.30 | 23.80 | 23.30 | 23.60 | 23.60 | 3.23 | 14,970 |   |  
            | 9/21/2011 | -0.30 / -1.23% | 24.30 | 24.40 | 24.00 | 24.00 | 24.00 | 3.28 | 31,020 |   |  			
            | 9/20/2011 | -0.20 / -0.82% | 24.90 | 24.90 | 24.20 | 24.30 | 24.30 | 3.32 | 48,370 |   |  
            | 9/19/2011 | 0.00 / 0.00% | 24.50 | 24.50 | 24.10 | 24.50 | 24.50 | 3.35 | 96,760 |   |  			
            | 9/16/2011 | 0.00 / 0.00% | 25.30 | 25.30 | 24.00 | 24.50 | 24.50 | 3.35 | 42,970 |   |  
            | 9/15/2011 | -1.20 / -4.67% | 25.70 | 26.20 | 24.50 | 24.50 | 24.50 | 3.35 | 54,280 |   |  			
            | 9/14/2011 | 0.00 / 0.00% | 26.00 | 26.30 | 25.40 | 25.70 | 25.70 | 3.52 | 52,240 |   |  
            | 9/13/2011 | +0.50 / +1.98% | 25.20 | 25.70 | 25.20 | 25.70 | 25.70 | 3.52 | 58,510 |   |  			
            | 9/12/2011 | +0.40 / +1.61% | 24.80 | 25.50 | 24.80 | 25.20 | 25.20 | 3.45 | 47,100 |   |  
            | 9/9/2011 | +1.10 / +4.64% | 23.60 | 24.80 | 23.60 | 24.80 | 24.80 | 3.39 | 102,770 |   |  			
            | 9/8/2011 | +1.10 / +4.87% | 22.60 | 23.70 | 22.60 | 23.70 | 23.70 | 3.24 | 68,110 |   |  
            | 9/7/2011 | +0.30 / +1.35% | 22.30 | 22.60 | 22.10 | 22.60 | 22.60 | 3.09 | 124,800 |   |  			
            | 9/6/2011 | +0.30 / +1.36% | 21.90 | 22.30 | 21.80 | 22.30 | 22.30 | 3.05 | 32,730 |   |  
            | 9/5/2011 | +0.10 / +0.46% | 22.10 | 22.40 | 21.90 | 22.00 | 22.00 | 3.01 | 99,020 |   |  			
            | 9/1/2011 | +0.30 / +1.39% | 21.60 | 21.90 | 21.30 | 21.90 | 21.90 | 3.00 | 63,260 |   |  
            | 8/31/2011 | +0.10 / +0.47% | 21.50 | 21.70 | 21.50 | 21.60 | 21.60 | 2.96 | 24,030 |   |  			
            | 8/30/2011 | 0.00 / 0.00% | 22.20 | 22.20 | 21.50 | 21.50 | 21.50 | 2.94 | 28,310 |   |  
            | 8/29/2011 | +0.30 / +1.42% | 21.30 | 21.50 | 21.20 | 21.50 | 21.50 | 2.94 | 7,200 |   |  			
            | 8/26/2011 | -0.60 / -2.75% | 21.50 | 21.50 | 21.20 | 21.20 | 21.20 | 2.90 | 7,680 |   |  
            | 8/25/2011 | -0.10 / -0.46% | 21.60 | 21.80 | 21.50 | 21.80 | 21.80 | 2.98 | 15,830 |   |  			
            | 8/24/2011 | +0.60 / +2.82% | 22.00 | 22.00 | 21.30 | 21.90 | 21.90 | 3.00 | 35,330 |   |  
            | 8/23/2011 | 0.00 / 0.00% | 21.40 | 21.40 | 21.30 | 21.30 | 21.30 | 2.91 | 34,000 |   |  			
            | 8/22/2011 | +0.20 / +0.95% | 21.70 | 21.70 | 21.20 | 21.30 | 21.30 | 2.91 | 49,150 |   |  
            | 8/19/2011 | -0.10 / -0.47% | 22.20 | 22.20 | 21.10 | 21.10 | 21.10 | 2.89 | 7,970 |   |  			
            | 8/18/2011 | 0.00 / 0.00% | 21.50 | 21.50 | 21.20 | 21.20 | 21.20 | 2.90 | 780 |   |  
            | 8/17/2011 | +0.20 / +0.95% | 21.40 | 21.50 | 21.00 | 21.20 | 21.20 | 2.90 | 27,950 |   |  			
            | 8/16/2011 | -0.60 / -2.78% | 21.60 | 21.60 | 21.00 | 21.00 | 21.00 | 2.87 | 18,980 |   |  
            | 8/15/2011 | -0.40 / -1.82% | 22.30 | 22.30 | 21.60 | 21.60 | 21.60 | 2.96 | 3,290 |   |  			
            | 8/12/2011 | 0.00 / 0.00% | 22.20 | 22.20 | 21.70 | 22.00 | 22.00 | 3.01 | 82,680 |   |  
            | 8/11/2011 | 0.00 / 0.00% | 22.00 | 22.00 | 22.00 | 22.00 | 22.00 | 3.01 | 5,050 |   |  |