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                    Closing price on 8/19/2010
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                    | Open | 20.00 |  
                    | High | 21.00 |  
                    | Low | 20.00 |  
                    | Volume | 98,500 |  
                    | Split-adjusted Price | 11.86 |  
                
             | 
 |  POT Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 8/19/2010 | 0.00 / 0.00% | 20.00 | 21.00 | 20.00 | 20.40 | 20.50 | 11.86 | 98,500 |   |  
            | 8/18/2010 | -0.90 / -4.23% | 21.00 | 21.00 | 20.20 | 20.40 | 20.50 | 11.86 | 134,900 |   |  			
            | 8/17/2010 | +0.10 / +0.47% | 22.50 | 22.50 | 20.50 | 21.30 | 21.23 | 12.38 | 141,800 |   |  
            | 8/16/2010 | +0.90 / +4.43% | 20.90 | 21.20 | 20.90 | 21.20 | 21.16 | 12.33 | 87,400 |   |  			
            | 8/13/2010 | +1.40 / +7.41% | 19.00 | 20.30 | 18.80 | 20.30 | 19.94 | 11.80 | 287,100 |   |  
            | 8/12/2010 | -1.50 / -7.35% | 20.70 | 20.70 | 18.80 | 18.90 | 19.02 | 10.99 | 199,800 |   |  			
            | 8/11/2010 | +1.10 / +5.70% | 19.70 | 20.40 | 19.20 | 20.40 | 20.24 | 11.86 | 139,700 |   |  
            | 8/10/2010 | -0.70 / -3.50% | 20.00 | 20.10 | 18.90 | 19.30 | 19.12 | 11.22 | 122,000 |   |  			
            | 8/9/2010 | -1.80 / -8.26% | 21.70 | 21.70 | 20.00 | 20.00 | 20.31 | 11.63 | 102,500 |   |  
            | 8/6/2010 | +0.10 / +0.46% | 21.40 | 21.80 | 21.30 | 21.80 | 21.50 | 12.68 | 72,300 |   |  			
            | 8/5/2010 | -0.10 / -0.46% | 21.80 | 22.80 | 21.50 | 21.70 | 21.93 | 12.62 | 93,300 |   |  
            | 8/4/2010 | -1.20 / -5.22% | 22.00 | 22.30 | 21.70 | 21.80 | 21.88 | 12.68 | 104,500 |   |  			
            | 8/3/2010 | -0.30 / -1.29% | 23.80 | 24.00 | 22.70 | 23.00 | 23.34 | 13.37 | 79,400 |   |  
            | 8/2/2010 | -1.20 / -4.90% | 24.00 | 24.10 | 23.30 | 23.30 | 23.71 | 13.55 | 107,700 |   |  			
            | 7/30/2010 | +0.10 / +0.41% | 24.80 | 24.90 | 24.20 | 24.50 | 24.53 | 14.25 | 103,000 |   |  
            | 7/29/2010 | +0.50 / +2.09% | 23.50 | 24.60 | 23.50 | 24.40 | 24.30 | 14.19 | 111,900 |   |  			
            | 7/28/2010 | -1.20 / -4.78% | 25.00 | 25.10 | 23.80 | 23.90 | 23.98 | 13.90 | 450,100 |   |  
            | 7/27/2010 | +0.10 / +0.40% | 25.60 | 26.10 | 25.10 | 25.10 | 25.53 | 14.59 | 105,900 |   |  			
            | 7/26/2010 | -0.90 / -3.47% | 25.50 | 26.20 | 24.90 | 25.00 | 25.36 | 14.54 | 123,900 |   |  
            | 7/23/2010 | -0.20 / -0.77% | 26.10 | 26.40 | 25.50 | 25.90 | 25.76 | 15.06 | 102,400 |   |  			
            | 7/22/2010 | -0.60 / -2.25% | 26.00 | 26.40 | 25.60 | 26.10 | 25.92 | 15.18 | 194,900 |   |  
            | 7/21/2010 | 0.00 / 0.00% | 27.00 | 27.50 | 26.30 | 26.70 | 27.01 | 15.52 | 232,000 |   |  			
            | 7/20/2010 | +0.50 / +1.91% | 26.30 | 27.80 | 26.00 | 26.70 | 26.66 | 15.52 | 327,100 |   |  
            | 7/19/2010 | 0.00 / 0.00% | 26.10 | 26.40 | 25.50 | 26.20 | 26.15 | 15.23 | 131,600 |   |  			
            | 7/16/2010 | +0.30 / +1.16% | 25.60 | 26.40 | 25.60 | 26.20 | 26.06 | 15.23 | 173,500 |   |  
            | 7/15/2010 | -1.10 / -4.07% | 27.00 | 27.00 | 25.80 | 25.90 | 26.10 | 15.06 | 203,300 |   |  			
            | 7/14/2010 | +0.20 / +0.75% | 28.10 | 28.20 | 26.00 | 27.00 | 27.47 | 15.70 | 343,100 |   |  
            | 7/13/2010 | +1.30 / +5.10% | 26.20 | 26.80 | 25.80 | 26.80 | 26.41 | 15.58 | 321,100 |   |  			
            | 7/12/2010 | +0.50 / +2.00% | 25.10 | 25.50 | 24.60 | 25.50 | 25.13 | 14.83 | 152,300 |   |  
            | 7/9/2010 | +0.80 / +3.31% | 24.50 | 25.60 | 24.50 | 25.00 | 25.01 | 14.54 | 146,800 |   |  |