The UA web store displays and quotes all pricing in US Dollars (USD), with the exception of customers purchasing from the United Kingdom and European Union who will see pricing in Pounds (GBP) and Euros (EUR) respectively. Depending on your country of residence, you may ultimately be billed in your local currency which can result in the charge on your bank statement (which will appear in your local currency) showing a different amount than the invoice for your plug-in purchase (which will appear in USD, unless purchasing from the UK or EU as noted above).
Note: Countries that use the "$" symbol for their local currency in addition to the US include Canada ( CAD ), Australia (AUD), Hong Kong (HKD), New Zealand (NZD), and Singapore (SGD). Whenever shown in the UA web store, the "$" symbol always represents US Dollars (USD).