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                    Closing price on 4/25/2019
                 |  |  
    
        |           
                
                    | Open | 3.74 |  
                    | High | 3.81 |  
                    | Low | 3.64 |  
                    | Volume | 398,850 |  
                    | Split-adjusted Price | 3.75 |  
                
             | 
 |  QBS Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 4/25/2019 | +0.05 / +1.35% | 3.74 | 3.81 | 3.64 | 3.75 | 3.72 | 3.75 | 398,850 |   |  
            | 4/24/2019 | +0.10 / +2.78% | 3.60 | 3.70 | 3.60 | 3.70 | 3.62 | 3.70 | 158,920 |   |  			
            | 4/23/2019 | 0.00 / 0.00% | 3.70 | 3.70 | 3.57 | 3.60 | 3.62 | 3.60 | 237,500 |   |  
            | 4/22/2019 | -0.16 / -4.26% | 3.72 | 3.74 | 3.60 | 3.60 | 3.67 | 3.60 | 109,760 |   |  			
            | 4/19/2019 | +0.05 / +1.35% | 3.75 | 3.82 | 3.66 | 3.76 | 3.76 | 3.76 | 209,230 |   |  
            | 4/18/2019 | -0.15 / -3.89% | 3.82 | 3.85 | 3.70 | 3.71 | 3.72 | 3.71 | 42,510 |   |  			
            | 4/17/2019 | -0.16 / -3.98% | 3.99 | 3.99 | 3.82 | 3.86 | 3.93 | 3.86 | 14,490 |   |  
            | 4/16/2019 | +0.07 / +1.77% | 3.90 | 4.02 | 3.90 | 4.02 | 3.96 | 4.02 | 43,430 |   |  			
            | 4/12/2019 | +0.25 / +6.76% | 3.70 | 3.95 | 3.67 | 3.95 | 3.80 | 3.95 | 81,240 |   |  
            | 4/11/2019 | -0.09 / -2.37% | 3.83 | 3.83 | 3.67 | 3.70 | 3.70 | 3.70 | 155,050 |   |  			
            | 4/10/2019 | -0.01 / -0.26% | 3.80 | 3.80 | 3.71 | 3.79 | 3.77 | 3.79 | 64,700 |   |  
            | 4/9/2019 | -0.15 / -3.80% | 3.85 | 3.95 | 3.80 | 3.80 | 3.82 | 3.80 | 130,490 |   |  			
            | 4/8/2019 | -0.05 / -1.25% | 4.05 | 4.05 | 3.74 | 3.95 | 3.95 | 3.95 | 235,630 |   |  
            | 4/5/2019 | -0.02 / -0.50% | 4.04 | 4.05 | 3.98 | 4.00 | 4.01 | 4.00 | 31,200 |   |  			
            | 4/4/2019 | -0.08 / -1.95% | 4.00 | 4.05 | 3.97 | 4.02 | 4.01 | 4.02 | 174,650 |   |  
            | 4/3/2019 | +0.05 / +1.23% | 4.05 | 4.10 | 4.05 | 4.10 | 4.07 | 4.10 | 23,320 |   |  			
            | 4/2/2019 | +0.04 / +1.00% | 4.03 | 4.06 | 4.01 | 4.05 | 4.06 | 4.05 | 34,740 |   |  
            | 4/1/2019 | -0.06 / -1.47% | 4.07 | 4.07 | 4.00 | 4.01 | 4.01 | 4.01 | 53,080 |   |  			
            | 3/29/2019 | -0.01 / -0.25% | 3.93 | 4.09 | 3.93 | 4.07 | 4.02 | 4.07 | 57,200 |   |  
            | 3/28/2019 | -0.05 / -1.21% | 4.13 | 4.13 | 4.00 | 4.08 | 4.04 | 4.08 | 95,570 |   |  			
            | 3/27/2019 | -0.02 / -0.48% | 4.15 | 4.15 | 4.08 | 4.13 | 4.11 | 4.13 | 74,140 |   |  
            | 3/26/2019 | -0.02 / -0.48% | 4.02 | 4.17 | 4.02 | 4.15 | 4.12 | 4.15 | 10,690 |   |  			
            | 3/25/2019 | -0.03 / -0.71% | 4.14 | 4.19 | 4.10 | 4.17 | 4.11 | 4.17 | 25,560 |   |  
            | 3/22/2019 | -0.02 / -0.47% | 4.22 | 4.22 | 4.15 | 4.20 | 4.18 | 4.20 | 17,940 |   |  			
            | 3/21/2019 | +0.02 / +0.48% | 4.15 | 4.23 | 4.15 | 4.22 | 4.16 | 4.22 | 20,170 |   |  
            | 3/20/2019 | +0.05 / +1.20% | 4.19 | 4.20 | 4.15 | 4.20 | 4.19 | 4.20 | 23,910 |   |  			
            | 3/19/2019 | -0.10 / -2.35% | 4.30 | 4.30 | 4.15 | 4.15 | 4.16 | 4.15 | 54,850 |   |  
            | 3/18/2019 | -0.01 / -0.23% | 4.21 | 4.25 | 4.18 | 4.25 | 4.21 | 4.25 | 71,260 |   |  			
            | 3/15/2019 | +0.05 / +1.19% | 4.29 | 4.29 | 4.20 | 4.26 | 4.26 | 4.26 | 23,420 |   |  
            | 3/14/2019 | -0.09 / -2.09% | 4.22 | 4.30 | 4.19 | 4.21 | 4.21 | 4.21 | 134,270 |   |  |