支付条款在函电中的拟定 — 国际贸易填空题
题目
某出口公司与德国买方签订一批电子产品出口合同，金额USD 50,000。双方约定采用电汇（T/T）结算，买方须在合同签订后15天内预付合同金额的20%，余款于装运后20天内付清。现需在给买方的确认函中补全支付条款：'Payment shall be made by T/T, with 20% of the contract value, i.e. USD ____, to be paid within 15 days after signing the contract, and the balance of USD 40,000 to be paid within 20 days after shipment.'