Here's how you can add an item in your shopping bag:
1) Browse for the items that you would like to purchase,
2) In the individual product page, click on 'Add to bag',
3) Once successful, you should receive a pop-up to inform you that item is ‘Added to bag’ and will subsequently be added to your shopping bag.
4) Select 'My shopping bag' button > 'Go to checkout'
Here's how you can add promotion code during checkout:
1) When you arrive at the checkout page, simply enter the code followed by the ‘Apply’ button on the right.
2) Once the code has been successfully redeemed, the total amount will be updated.