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            | 
                    Closing price on 3/6/2019
                 |  |  
    
        |           
                
                    | Open | 4.35 |  
                    | High | 4.39 |  
                    | Low | 4.28 |  
                    | Volume | 37,760 |  
                    | Split-adjusted Price | 4.31 |  
                
             | 
 |  QBS Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 3/6/2019 | -0.07 / -1.60% | 4.35 | 4.39 | 4.28 | 4.31 | 4.32 | 4.31 | 37,760 |   |  
            | 3/5/2019 | -0.01 / -0.23% | 4.38 | 4.39 | 4.35 | 4.38 | 4.37 | 4.38 | 28,360 |   |  			
            | 3/4/2019 | +0.19 / +4.52% | 4.20 | 4.40 | 4.11 | 4.39 | 4.30 | 4.39 | 69,800 |   |  
            | 3/1/2019 | +0.06 / +1.45% | 4.23 | 4.23 | 4.08 | 4.20 | 4.13 | 4.20 | 10,180 |   |  			
            | 2/28/2019 | -0.04 / -0.96% | 4.16 | 4.24 | 4.10 | 4.14 | 4.14 | 4.14 | 48,360 |   |  
            | 2/27/2019 | -0.06 / -1.42% | 4.29 | 4.29 | 4.16 | 4.18 | 4.17 | 4.18 | 15,570 |   |  			
            | 2/26/2019 | 0.00 / 0.00% | 4.22 | 4.27 | 4.18 | 4.24 | 4.21 | 4.24 | 68,720 |   |  
            | 2/25/2019 | -0.04 / -0.93% | 4.25 | 4.35 | 4.22 | 4.24 | 4.24 | 4.24 | 12,510 |   |  			
            | 2/22/2019 | -0.02 / -0.47% | 4.21 | 4.28 | 4.20 | 4.28 | 4.22 | 4.28 | 26,060 |   |  
            | 2/21/2019 | -0.04 / -0.92% | 4.29 | 4.30 | 4.21 | 4.30 | 4.23 | 4.30 | 41,880 |   |  			
            | 2/20/2019 | +0.04 / +0.93% | 4.35 | 4.40 | 4.27 | 4.34 | 4.28 | 4.34 | 27,120 |   |  
            | 2/19/2019 | -0.06 / -1.38% | 4.40 | 4.40 | 4.27 | 4.30 | 4.31 | 4.30 | 88,720 |   |  			
            | 2/18/2019 | 0.00 / 0.00% | 4.33 | 4.48 | 4.30 | 4.36 | 4.34 | 4.36 | 25,800 |   |  
            | 2/15/2019 | -0.04 / -0.91% | 4.36 | 4.39 | 4.30 | 4.36 | 4.34 | 4.36 | 69,840 |   |  			
            | 2/14/2019 | -0.06 / -1.35% | 4.52 | 4.52 | 4.36 | 4.40 | 4.38 | 4.40 | 45,630 |   |  
            | 2/13/2019 | -0.03 / -0.67% | 4.45 | 4.49 | 4.36 | 4.46 | 4.41 | 4.46 | 79,000 |   |  			
            | 2/12/2019 | -0.03 / -0.66% | 4.52 | 4.52 | 4.21 | 4.49 | 4.36 | 4.49 | 155,160 |   |  
            | 2/11/2019 | +0.03 / +0.67% | 4.46 | 4.59 | 4.46 | 4.52 | 4.52 | 4.52 | 119,490 |   |  			
            | 2/1/2019 | 0.00 / 0.00% | 4.50 | 4.53 | 4.49 | 4.49 | 4.51 | 4.49 | 324,090 |   |  
            | 1/31/2019 | +0.01 / +0.22% | 4.50 | 4.50 | 4.45 | 4.49 | 4.48 | 4.49 | 356,890 |   |  			
            | 1/30/2019 | 0.00 / 0.00% | 4.48 | 4.48 | 4.40 | 4.48 | 4.45 | 4.48 | 103,760 |   |  
            | 1/29/2019 | -0.01 / -0.22% | 4.49 | 4.52 | 4.46 | 4.48 | 4.48 | 4.48 | 311,290 |   |  			
            | 1/28/2019 | 0.00 / 0.00% | 4.50 | 4.53 | 4.49 | 4.49 | 4.50 | 4.49 | 67,500 |   |  
            | 1/25/2019 | -0.06 / -1.32% | 4.48 | 4.58 | 4.46 | 4.49 | 4.54 | 4.49 | 104,220 |   |  			
            | 1/24/2019 | +0.10 / +2.25% | 4.60 | 4.60 | 4.50 | 4.55 | 4.51 | 4.55 | 355,890 |   |  
            | 1/23/2019 | -0.15 / -3.26% | 4.51 | 4.58 | 4.39 | 4.45 | 4.48 | 4.45 | 179,430 |   |  			
            | 1/22/2019 | +0.10 / +2.22% | 4.48 | 4.60 | 4.19 | 4.60 | 4.37 | 4.60 | 390,100 |   |  
            | 1/21/2019 | -0.07 / -1.53% | 4.51 | 4.57 | 4.46 | 4.50 | 4.53 | 4.50 | 73,700 |   |  			
            | 1/18/2019 | -0.06 / -1.30% | 4.61 | 4.68 | 4.57 | 4.57 | 4.60 | 4.57 | 197,230 |   |  
            | 1/17/2019 | -0.07 / -1.49% | 4.80 | 4.80 | 4.63 | 4.63 | 4.68 | 4.63 | 409,120 |   |  |