text: import Expresso from './Expresso';
  import Mocha from './Mocha';
  import Whip from './Whip';
  
  let oEspressoWithMochaAndWhip = new Espresso();
  oEspressoWithMochaAndWhip = new Mocha(oEspressoWithMochaAndWhip);
  oEspressoWithMochaAndWhip = new Whip(oEspressoWithMochaAndWhip);
  
  console.log(oEspressoWithMochaAndWhip.cost());