Assignment #103 and Keychains for sale, real ultimate power

Code

    ///Name: Tim Gibson
    ///Period: 6
    ///Project Name: Keychains for sale 3
    ///File Name: Keychains3.java
    ///Date Finished: 11/20/15
        
    import java.util.Scanner;
    
    public class Keychains3
    {
        public static void main ( String[] args )
        {
            Scanner kb = new Scanner(System.in);
            
            System.out.println( "Keychain Shop" );
            
            int choice, kChains, price, shipping, addShipping;
            kChains = 0;
            price = 10;
            double tax = .0825;
            shipping = 5;
            addShipping = 1;
            do
            {
                System.out.print( "\n1. Add Keychains to Order \n2. Remove Keychains from Order \n3. View Current Order \n4. Checkout \n\nPlease Enter your choice: " );
                choice = kb.nextInt();
                System.out.println();
                
                if ( choice == 1 && kChains >= 0 )
                    kChains = addKeychains(kChains);
                    
                else if ( choice == 2 && kChains >= 0 )
                    kChains = removeKeychains(kChains);
                
                else if ( choice == 3 && kChains >= 0)
                    viewOrder(kChains,price,tax,shipping,addShipping);
                
                else if ( choice == 4 && kChains >= 0 )
                    checkout(kChains,price,tax,shipping,addShipping);
                else if ( kChains < 0 )
                    System.out.println( "You have less than one keychain. Please leae the shop becuase that is not allowed.");
                else
                    System.out.print( "Error" );
            } while ( choice != 4 && kChains >= 0 );
        }
        
        public static int addKeychains( int kChains )
        {
            Scanner kb = new Scanner(System.in);
            
            int add;
            
            System.out.print( "You have " + kChains + " keychains. How many to add? " );
            add = kb.nextInt();
            kChains += add;
            System.out.println( "You now have " + kChains + " keychains.\n" );
            return kChains;
        }
        
        public static int removeKeychains(int kChains)
        {
            Scanner kb = new Scanner(System.in);
            
            int remove;
            
            System.out.print( "You have " + kChains + " keychains. How many would you like to remove. " );
            remove = kb.nextInt();
            
            kChains -= remove;
            System.out.println( "You now have " + kChains + " keychains.\n" );
            return kChains;
        }
        
        public static void viewOrder(int kChains, int price, double tax, int shipping, int addShipping)
        {
            
            int shipTotal = shipping + ( kChains * addShipping );
            int subTotal = shipTotal + ( price * kChains );
            double total = subTotal + ( tax * subTotal );
            
            System.out.println( "You have " + kChains + " keychains. \nKechains cost $" + price + " each. \nShipping total is $" + shipTotal + ". \nSubtotal is $" + subTotal + "\nTotal cost is $" + total + ".\n" );
        }
        
        public static void checkout( int kChains, int price, double tax, int shipping, int addShipping )
        {
            Scanner kb = new Scanner(System.in);
            
            String name;
             System.out.print( "What is your name? " );
            name = kb.next();
            viewOrder(kChains,price,tax,shipping,addShipping);
            System.out.println("Thanks for shopping " + name + "." );
        }
    }
    

Picture of the output