Assignment #102 and Keychains for Sale, for real this time

Code

    /// Name: Ali Kurland
    /// Period: 6
    /// Program Name: Keychains for Sale, for real this time
    /// File Name: RealKeychains.java
    /// Date Finished: 12/7/2015
    
    import java.util.Scanner;
    
    public class RealKeychains
    {
        public static void main ( String[] args )
        {
            Scanner keyboard = new Scanner(System.in);
            
            int choice, numKeychains = 0, perKeychain = 10;
            
            System.out.println("Super Cool Keychain Shop");
            
            do
            {
            System.out.println("\n1. Add Keychains to Order");
            System.out.println("2. Remove Keychains from Order");
            System.out.println("3. View Current Order");
            System.out.println("4. Checkout");
            System.out.print("\nPlease enter your choice: ");
            choice = keyboard.nextInt();
            
            if ( choice == 1 )
            {
                numKeychains = addKeychains(numKeychains);
            }
            else if ( choice == 2 )
            {
                numKeychains = removeKeychains(numKeychains);
            }
            else if (choice == 3)
            {
                viewOrder(numKeychains,perKeychain);
            }
            else
            {
                checkout(numKeychains,perKeychain);
            }
            }while ( choice != 4 );
        }
        
        public static int addKeychains( int numKeychains )
        {
            Scanner keyboard = new Scanner(System.in);
            
            System.out.print("\nYou have " + numKeychains + " keychains. How many to add? ");
            int add = keyboard.nextInt();
            numKeychains = numKeychains + add;
            
            System.out.print("You now have " + numKeychains + " keychains.\n");
            return numKeychains;
        }
        
        public static int removeKeychains( int numKeychains )
        {
            Scanner keyboard = new Scanner(System.in);
            
            System.out.print("\nYou have " + numKeychains + " keychains. How many to remove? ");
            int remove = keyboard.nextInt();
            numKeychains = numKeychains - remove;
            
            System.out.print("You now have " + numKeychains + " keychains.\n");
            return numKeychains;
        }
        
        public static void viewOrder( int numKeychains, perKeychain )
        {
            System.out.println( "\nYou have " + numKeychains + " keychains. " );
            System.out.println( "Keychains cost $" + perKeychain + " each. " );
            System.out.println( "Total cost is $" + ( numKeychains * perKeychain ) + "." );
        }
        
        public static void checkout( int numKeychains, perKeychain )
        {
            Scanner keyboard = new Scanner(System.in);
            
            System.out.println("\nCHECKOUT\n");
            
            System.out.print( "What is your name? " );
            String name = keyboard.next();
            viewOrder(numKeychains,perKeychain);
            System.out.println( "Thanks for your order, " + name + "!" );
        }
    }
    

Picture of the output