The total cost of the order to the customer. If shipping cost and tax charges are known, include them in OrderTotal; if not, OrderTotal should be the current sub-total of the order. You must set the currencyID attribute to one of the three-character currency codes for any of the supported PayPal currencies. Limitations: Must not exceed $10,000 USD in any currency. No currency symbol. Decimal separator must be a period (.), and the thousands separator must be a comma (,).