NOTE: You can change which currency is used when transactions are sent to the gateway for each "MoreStore" site by setting store-specific values in the Localization.StoreCurrency and Localization.StoreCurrencyNumericCode AppConfigs, but it is not generally recommended to do this. Since product price cannot currently vary by store, it is best to stick with one currency, or at most use additional currencies for display purposes only. Doing more than that can lead to confusion in what the base price of a product is, and what will really be sent to the gateway and show up on the customers' receipts.