The UA web store displays and quotes all pricing in US Dollars (USD).
You will be billed in US dollars; however, depending on your country of residence, your invoice can result in a different charge on your bank statement as it is converted by your financial institution and may appear in your local currency.
Note: Other countries use the term "dollar" as their currency; however, whenever shown in the UA web store, the $ symbol always represents US Dollars (USD).