function Hamburger(size, filling, extended) {

  Hamburger.TYPE_SMALL = 'small';

    Hamburger.TYPE_BIG = 'big';

    Hamburger.FILLING_CHEESE = 'cheese';

    Hamburger.FILLING_SALAD = 'salad';

    Hamburger.FILLING_POTATO = 'potato';

    Hamburger.EXTENDED_SEASONING = 'seasoning';

    Hamburger.EXTENDED_SAUCE = 'sauce';

    this.prices = {

        'small': 50,

        'big': 100,

        'cheese': 10,

        'salad': 20,

        'potato': 15,

        'seasoning': 15,

        'sauce': 20

    };

    this.calories = {

        'small': 20,

        'big': 40,

        'cheese': 20,

        'salad': 5,

        'potato': 10,

        'seasoning': 0,

        'sauce': 5

    };

    this.getCost = function() {

        console.log(this.prices[size] + this.prices[filling]);

    };

    this.getCalories = function() {

        console.log(this.calories[size] + this.calories[filling]);

    };

}

​

var hamburger = new Hamburger('small', 'cheese');

​

hamburger.getCost();

hamburger.getCalories();