请参阅此示例，并相应地进行更改。基本上将下划线添加到项目名称的编号之前，并给唯一的名称加上下划线和编号。
您必须根据购物车总额将金额分配给每个项目。
<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="youremail@mail.com">
<input type="hidden" name="currency_code" value="USD">
<input type="hidden" name="item_name_1" value="beach ball">
<input type="hidden" name="amount_1" value="15">
<input type="hidden" name="item_name_2" value="towel">
<input type="hidden" name="amount_2" value="20">
<input type="image" src="http://www.paypal.com/en_US/i/btn/x-click-but01.gif" name="submit" alt="Make payments with PayPal - it's fast, free and secure!">
</form>
<input type="hidden" name="quantity_1" value="1">
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