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                    Closing price on 6/12/2012
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        |           
                
                    | Open | 12.60 |  
                    | High | 12.70 |  
                    | Low | 11.90 |  
                    | Volume | 96,700 |  
                    | Split-adjusted Price | 7.81 |  
                
             | 
 |  POT Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 6/12/2012 | -0.80 / -6.25% | 12.60 | 12.70 | 11.90 | 12.00 | 12.26 | 7.81 | 96,700 |   |  
            | 6/11/2012 | +0.20 / +1.59% | 12.60 | 13.30 | 12.40 | 12.80 | 12.87 | 8.33 | 97,000 |   |  			
            | 6/8/2012 | +0.80 / +6.78% | 12.60 | 12.60 | 12.40 | 12.60 | 12.58 | 8.20 | 323,900 |   |  
            | 6/7/2012 | +0.80 / +7.27% | 11.50 | 11.80 | 11.50 | 11.80 | 11.76 | 7.68 | 75,500 |   |  			
            | 6/6/2012 | -0.10 / -0.90% | 10.90 | 11.70 | 10.90 | 11.00 | 11.21 | 7.16 | 62,500 |   |  
            | 6/5/2012 | +0.40 / +3.74% | 11.00 | 11.20 | 10.50 | 11.10 | 10.88 | 7.23 | 64,400 |   |  			
            | 6/4/2012 | -0.70 / -6.14% | 11.20 | 11.20 | 10.70 | 10.70 | 10.76 | 6.97 | 111,700 |   |  
            | 6/1/2012 | 0.00 / 0.00% | 11.40 | 11.50 | 11.00 | 11.40 | 11.41 | 7.42 | 40,700 |   |  			
            | 5/31/2012 | -0.80 / -6.56% | 12.00 | 12.00 | 11.20 | 11.40 | 11.42 | 7.42 | 101,240 |   |  
            | 5/30/2012 | +0.40 / +3.39% | 12.00 | 12.70 | 11.80 | 12.20 | 12.04 | 7.94 | 42,800 |   |  			
            | 5/29/2012 | -0.20 / -1.67% | 11.90 | 12.10 | 11.50 | 11.80 | 11.69 | 7.68 | 90,300 |   |  
            | 5/28/2012 | -0.90 / -6.98% | 13.40 | 13.40 | 12.00 | 12.00 | 12.36 | 7.81 | 199,100 |   |  			
            | 5/25/2012 | +0.60 / +4.88% | 12.50 | 12.90 | 12.50 | 12.90 | 12.87 | 8.40 | 65,409 |   |  
            | 5/24/2012 | -0.50 / -3.91% | 12.00 | 12.70 | 12.00 | 12.30 | 12.11 | 8.01 | 140,204 |   |  			
            | 5/23/2012 | -1.00 / -7.25% | 13.30 | 13.80 | 12.80 | 12.80 | 12.98 | 8.33 | 160,400 |   |  
            | 5/22/2012 | +0.90 / +6.98% | 12.70 | 13.80 | 12.70 | 13.80 | 13.59 | 8.98 | 251,924 |   |  			
            | 5/21/2012 | +0.80 / +6.61% | 12.40 | 12.90 | 12.40 | 12.90 | 12.78 | 8.40 | 115,540 |   |  
            | 5/18/2012 | -1.00 / -7.63% | 12.80 | 12.80 | 12.10 | 12.10 | 12.14 | 7.88 | 331,800 |   |  			
            | 5/17/2012 | -0.50 / -3.68% | 13.50 | 14.00 | 13.00 | 13.10 | 13.50 | 8.53 | 101,300 |   |  
            | 5/16/2012 | -0.60 / -4.23% | 14.40 | 14.40 | 13.30 | 13.60 | 13.42 | 8.85 | 205,200 |   |  			
            | 5/15/2012 | -1.00 / -6.58% | 15.30 | 15.30 | 14.20 | 14.20 | 14.41 | 9.24 | 204,700 |   |  
            | 5/14/2012 | +0.50 / +3.40% | 14.70 | 15.70 | 14.50 | 15.20 | 15.43 | 9.90 | 521,744 |   |  			
            | 5/11/2012 | -0.10 / -0.68% | 14.00 | 15.00 | 14.00 | 14.70 | 14.55 | 9.57 | 213,740 |   |  
            | 5/10/2012 | -1.10 / -6.92% | 16.70 | 16.70 | 14.80 | 14.80 | 15.10 | 9.64 | 298,516 |   |  			
            | 5/9/2012 | +1.00 / +6.71% | 15.80 | 15.90 | 14.90 | 15.90 | 15.75 | 10.35 | 608,200 |   |  
            | 5/8/2012 | +0.90 / +6.43% | 14.90 | 14.90 | 14.50 | 14.90 | 14.90 | 9.70 | 1,050,769 |   |  			
            | 5/7/2012 | +0.90 / +6.87% | 14.00 | 14.00 | 14.00 | 14.00 | 14.00 | 9.11 | 128,656 |   |  
            | 5/4/2012 | +0.80 / +6.50% | 13.10 | 13.10 | 13.10 | 13.10 | 13.10 | 8.53 | 101,864 |   |  			
            | 5/3/2012 | +0.80 / +6.96% | 12.30 | 12.30 | 12.30 | 12.30 | 12.30 | 8.01 | 63,700 |   |  
            | 5/2/2012 | +0.70 / +6.48% | 11.50 | 11.50 | 11.50 | 11.50 | 11.50 | 7.49 | 6,000 |   |  |