public IBag CreateBag()
        {
            Bag b = new Bag();

            DefaultProgram.DoWork("Hire cheap labour", 200);
            DefaultProgram.DoWork("Cut Plastic", 125);
            DefaultProgram.DoWork("Sew Plastic", 500);
            b.Properties += "Plastic";
            DefaultProgram.DoWork("Add Label", 100);
            b.Properties += " with label";
            return(b);
        }
        public IBag CreateBag()
        {
            Bag b = new Bag();

            DefaultProgram.DoWork("Cut Leather", 250);
            DefaultProgram.DoWork("Sew leather", 1000);
            b.Properties += "Leather";
            DefaultProgram.DoWork("Create Lining", 500);
            DefaultProgram.DoWork("Attach Lining", 1000);
            b.Properties += " lined";
            DefaultProgram.DoWork("Add Label", 250);
            b.Properties += " with label";
            return(b);
        }