The Oakland Avenue is approximately what the time you think is it now though you have 120 days to
        
             
        
        
        
50,70,80,100,110,130 that would be it
        
             
        
        
        
For this equation after the substitution you will get y=-1.
        
             
        
        
        
The amount for the discount is 150$
 
        
                    
             
        
        
        
C=1.56n
Should give the the total price of n pounds of blackberry