How Backpack calculates the exchange rate? Backpack Support November 28, 2017 08:36 Updated Follow Currently, we are charging BDT84/USD. We are charging this amount based on the “HSBC Bangladesh dollar sales rate”. You can see this PDF for reference http://bit.ly/2nMSRo8 . Here the USD cash sells rate has been taken into account. Related articles What is Backpack credit and how does it work? Why is there a shipping charge added to my item? How do I pay for items? Why is there a W/D charge added to the total price of my item? Do I have to make payment in advance? Comments 0 comments Please sign in to leave a comment.