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                    Closing price on 7/24/2009
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                    | Open | 11.80 |  
                    | High | 11.90 |  
                    | Low | 11.80 |  
                    | Volume | 57,100 |  
                    | Split-adjusted Price | 6.60 |  
                
             | 
 |  POT Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 7/24/2009 | +0.50 / +4.39% | 11.80 | 11.90 | 11.80 | 11.90 | 11.90 | 6.60 | 57,100 |   |  
            | 7/23/2009 | +0.10 / +0.88% | 11.00 | 11.40 | 10.80 | 11.40 | 11.24 | 6.32 | 24,900 |   |  			
            | 7/22/2009 | +0.40 / +3.67% | 10.90 | 11.30 | 10.80 | 11.30 | 11.14 | 6.27 | 17,600 |   |  
            | 7/21/2009 | +0.10 / +0.93% | 10.90 | 11.20 | 10.70 | 10.90 | 10.95 | 6.04 | 14,800 |   |  			
            | 7/20/2009 | -0.50 / -4.42% | 10.80 | 10.80 | 10.60 | 10.80 | 10.72 | 5.99 | 24,100 |   |  
            | 7/17/2009 | +0.10 / +0.89% | 11.00 | 11.40 | 10.80 | 11.30 | 11.25 | 6.27 | 34,800 |   |  			
            | 7/16/2009 | +0.10 / +0.90% | 11.30 | 11.30 | 11.00 | 11.20 | 11.20 | 6.21 | 45,900 |   |  
            | 7/15/2009 | +0.10 / +0.91% | 11.40 | 11.40 | 10.80 | 11.10 | 11.12 | 6.15 | 17,900 |   |  			
            | 7/14/2009 | +0.10 / +0.92% | 10.80 | 11.30 | 10.80 | 11.00 | 11.13 | 6.10 | 32,100 |   |  
            | 7/13/2009 | -0.50 / -4.39% | 11.10 | 11.30 | 10.80 | 10.90 | 11.02 | 6.04 | 20,200 |   |  			
            | 7/10/2009 | -0.10 / -0.87% | 11.30 | 11.50 | 11.20 | 11.40 | 11.31 | 6.32 | 20,000 |   |  
            | 7/9/2009 | +0.30 / +2.68% | 11.40 | 11.50 | 11.20 | 11.50 | 11.35 | 6.38 | 27,300 |   |  			
            | 7/8/2009 | -0.30 / -2.61% | 10.90 | 11.40 | 10.90 | 11.20 | 11.17 | 6.21 | 25,100 |   |  
            | 7/7/2009 | -0.10 / -0.86% | 11.50 | 12.00 | 11.40 | 11.50 | 11.70 | 6.38 | 61,500 |   |  			
            | 7/6/2009 | +0.60 / +5.45% | 11.00 | 11.60 | 11.00 | 11.60 | 11.49 | 6.43 | 43,900 |   |  
            | 7/3/2009 | 0.00 / 0.00% | 10.50 | 11.20 | 10.40 | 11.00 | 10.89 | 6.10 | 19,900 |   |  			
            | 7/2/2009 | +0.50 / +4.76% | 11.00 | 11.00 | 10.30 | 11.00 | 10.81 | 6.10 | 34,300 |   |  
            | 7/1/2009 | -0.20 / -1.87% | 10.40 | 10.50 | 10.20 | 10.50 | 10.34 | 5.82 | 47,400 |   |  			
            | 6/30/2009 | -0.30 / -2.73% | 11.10 | 11.20 | 10.60 | 10.70 | 10.93 | 5.93 | 62,000 |   |  
            | 6/29/2009 | +0.20 / +1.85% | 11.30 | 11.30 | 11.00 | 11.00 | 11.06 | 6.10 | 17,700 |   |  			
            | 6/26/2009 | -0.30 / -2.70% | 11.90 | 11.90 | 10.80 | 10.80 | 11.31 | 5.99 | 44,500 |   |  
            | 6/25/2009 | -0.90 / -7.50% | 12.50 | 12.50 | 11.10 | 11.10 | 11.61 | 6.15 | 30,900 |   |  			
            | 6/24/2009 | +0.70 / +6.19% | 10.70 | 12.00 | 10.60 | 12.00 | 11.90 | 6.65 | 42,800 |   |  
            | 6/23/2009 | -0.70 / -5.83% | 11.30 | 11.40 | 11.30 | 11.30 | 11.31 | 6.27 | 34,300 |   |  			
            | 6/22/2009 | -0.50 / -4.00% | 12.50 | 12.80 | 12.00 | 12.00 | 12.09 | 6.65 | 32,900 |   |  
            | 6/19/2009 | -0.10 / -0.79% | 13.40 | 13.40 | 12.50 | 12.50 | 12.89 | 6.93 | 47,900 |   |  			
            | 6/18/2009 | -0.20 / -1.56% | 12.60 | 12.60 | 12.60 | 12.60 | 12.60 | 6.99 | 27,100 |   |  
            | 6/17/2009 | +0.30 / +2.40% | 11.70 | 12.80 | 11.70 | 12.80 | 11.84 | 7.10 | 124,500 |   |  			
            | 6/16/2009 | -1.00 / -7.41% | 12.50 | 13.00 | 12.50 | 12.50 | 12.51 | 6.93 | 73,700 |   |  
            | 6/15/2009 | -0.30 / -2.17% | 14.20 | 14.40 | 13.30 | 13.50 | 13.40 | 7.49 | 107,100 |   |  |