银联汇率http://en.unionpay.com/front_ExchangeRate.html
V家汇率http://usa.visa.com/personal/card-benefits/travel/exchange-rate-calculator.jsp
M家汇率https://www.mastercard.com/global/currencyconversion/index.html
印尼银行官方汇率http://www.bi.go.id/id/moneter/informasi-kurs/transaksi-bi/Default.aspx