app.js

function buildShoppingCartDetails() {
  return {
    id: 'count-order',
    displayItems: [
      {
        label: 'Example item',
        amount: {currency: 'USD', value: '1.00'}
      }
    ],
    total: {
      label: 'Total',
      amount: {currency: 'USD', value: count }
    }
  };
}