I am sorry that I cannot change price on goods already sold to you. Please be assured that I will refund US$2.50 to you after receipt of your payment in full.
Because you have bought, I can not change the amount of items, your first payment to me, I then step back to 2.5 U.S. dollars to you! 參考資料︰http://translate.google.com.hk/ (Google翻譯)自己[hope I can help you(希望幫到你),其他回答者請勿抄襲,其他回答者請勿參考或「抄考」,發問者請勿移除問題,其他網友請勿檢舉本答案]