When purchasing tracks in the checkout, you can submit a promotional code to apply a special discounted rate to items in your cart.
To do this you will need to have a valid code. Enter this code at the checkout and and hit 'add'.
If your code is successful the rate will be applied to tracks that meet the conditions of the special rate conditions. This is highlighted in the purchase summary:
To remove a special rate, click the X icon on the 'applied codes' section.
You may add multiple promotional codes however, the last code added will be applied if the tracks meets the rate conditions.
When you complete the purchase, the special rate will be listed in the invoice.