have a string 
                  
                  
                  
                  
                  
                  amount = 120 
                  
                  
                  
                  
                  
                  if i add new item of 30 
                  
                  
                  
                  
                  
                  then amount should 
                  
                  
                  
                  
                  
                  now 
                  
                  
                  
                  
                  
                  amount = 150
                  
                  
                
How about have the amount as an int and then output it as a string int amount = 120 amount +=30 println("Amount: " + amount)
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