Website help

I've set up several Arduino accounts in order for me to purchase a product.
However, once I create the account the website converts all of the prices from USD to pounds?
How would I go about changing it so that it suits my needs?
thank you

In the top right corner of the store page, there is a small box below your profile picture and arduino store cart. Click it and a list will drop down. Select USD and you are good to go.

Well, I tried that and once I get to the items in my shopping cart when I'm just about to check out. It changes the currency to pounds again

In the cart, there is the same drop-down list. Just change it back to USD.