Assignemnt #103: Keychains for Sale, real ultimate power

Code

    /// Name: Cassie
    /// Period: 6
    /// Program Name: Keychains for Sale, real ultimate power
    /// File Name: UltimateKeychains.java
    /// Date Finished: 3/12/2016
    
    import java.util.Scanner;
    
    public class UltimateKeychains {
        
        public static void main( String[] args ) {
            
            Scanner keyboard = new Scanner(System.in);
            
            int choice = 1, numKeychains = 0, price = 10, shipping = 5, extraShipping = 1;
            double salesTax = 8.25;
            
            System.out.println( "Rachel's Keychain Boutique" );
            System.out.println();
            
            while ( choice != 4 ) {
                
                System.out.println( "1. 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.println();
                System.out.print( "Please enter your choice: " );
                choice = keyboard.nextInt();
                System.out.println();
    
                if ( choice == 1 ) {
                    
                    numKeychains = addKeychains( numKeychains );
                    System.out.println( "You now have " + numKeychains + " keychains." );
                    
                } else if ( choice == 2 ) {
                    
                    numKeychains = removeKeychains( numKeychains );
                    System.out.println( "You now have " + numKeychains + " keychains." );
                    
                } else if ( choice == 3 ) {
                    
                    viewOrder( numKeychains, price, shipping, extraShipping, salesTax );
                    
                } else if ( choice == 4 ) {
                    
                    checkout( numKeychains, price, shipping, extraShipping, salesTax );
                    
                } else {
                    
                    System.out.println( "Please try again." );
                    
                }
                
                System.out.println();
            }
        }
        
        public static int addKeychains( int keychains ) {
            Scanner keyboard = new Scanner(System.in);
            System.out.print( "You have " + keychains + " keychains. How many to add? " );
            int add = keyboard.nextInt();
            keychains = keychains + add;
            return keychains;
        }
        
        public static int removeKeychains( int keychains ) {
            Scanner keyboard = new Scanner(System.in);
            int remove = 0;
            
            do {
                System.out.print( "You have " + keychains + " keychains. How many to remove? " );
                remove = keyboard.nextInt();
            
                if ( remove > keychains ) {
                    System.out.println( "You cannot remove that many! Try again." );
                }
            } while ( remove > keychains );
                
            keychains = keychains - remove;
            return keychains;
        }
        
        public static void viewOrder( int num, int cost, int shipping, int extraShipping, double salesTax ) {
            int total = num * cost;
            int totalShipping = shipping + (num-1) * (extraShipping);
            int withShipping = total + totalShipping;
            double finalCost = withShipping * salesTax / 100 + withShipping;
            System.out.println( "You have " + num + " keychains." );
            System.out.println( "Keychains cost $" + cost + " each." );
            System.out.println( "Shipping charges amount to $" + totalShipping + "." );
            System.out.println( "Total cost before tax is $" + withShipping + "." );
            System.out.println( "Total cost after tax in $" + finalCost + "." );
        }
        
        public static void checkout( int num, int cost, int shipping, int extraShipping, double salesTax ) {
            Scanner keyboard = new Scanner(System.in);
            System.out.print( "What is your name? " );
            String name = keyboard.next();
            viewOrder( num, cost, shipping, extraShipping, salesTax );
            System.out.println( "Thanks for your order, " + name + "!" );
        }
    }
    

Picture of the output