We use $USD as our base currency.
These prices are fairly static and only change when we run a promotion or the supplier cost requires it.
When you view products in a currency other than $USD these are based on the current exchange rates. We update the exchange rates used daily. This can lead to slight changes in the cost of products from one day to the next.
The alternative currencies are offered as a benefit to our customers so that you can be billed in your local currency and avoid any exchange rate fees imposed by your card issuer.