paypal接口参数之优惠

Question

客户希望在paypal账单中显示优惠条件，示例类似如下：
                         账单页面                          接口参数
                         总价：$95.96                 -----amount=95.96
                         运费：$50.00                 -----shipping=95.96
                   优惠折扣等：-$20.00                -----？
                        总计 :$125.96                 -----‘？’写什么接口参数呢？

Answer 1

写错了：运费：$50.00 -----shipping=50.00

Answer 2

楼主, 问个问题:
<form action="https://www.paypal.com/cgi-bin/webscr" method="post">
<input type="hidden" name="cmd" value="_cart">
<input type="hidden" name="upload" value="1">
<input type="hidden" name="business" value="[email protected]">
<input type="hidden" name="currency_code" value="HKD">
<input type="hidden" name="item_name_1" value="Item Name 1">
<input type="hidden" name="amount_1" value="1.00"> 
<input type="hidden" name="quantity_1" value="3"> 
<input type="hidden" name="lang" value="C" /><input type="hidden" name="shipping" value="40.00" />
<input type="hidden" name="discount_amount" value="20.00" /><input type="submit" value="PayPal"> 
</form> Paypal那边怎么不显示计算 运费和优惠呢?