How many items must this company sell in order to break even?  How do you know this?  
    
    
         
    
        
     
    
    
            
            
Use the tools of GeoGebra to find the marginal revenue at x = 3000 items sold.  What does this value mean with respect to this context?  
    
    
         
    
        
     
    
    
            
            
Use the tools of GeoGebra to find the marginal profit at x = 7000 items sold.  What does this value mean with respect to this context?  
    
    
         
    
        
     
    
    
            
            
Does maximizing revenue guarantee a maximization of profit? How does this context illustrate or NOT HELP illustrate this statement?