在if语句中将运输和处理金额添加到总额中 - Adding shipping and handling amount to total in an if statement

Adding shipping and handling amount to total in an if statement

我正在尝试将运输和处理金额添加到if语句中的$grandtotal：

Order #: <? echo $ORDERID?><br />
<br />
Pick-Up Date: <? echo $MYPICKUP?><br />
Comments: <? echo $COMMENTS?><br /><br />  
<?php
$paypal = 'paypal';
$check = 'check';
if ($PAYMETHOD == $paypal)
{
    echo "Shipping & Handling = ".($GRANDTOTAL * .045);
}
    elseif ($PAYMETHOD == $check)
{
    echo "Shipping & Handling = 0";
}
?><br />
Grand Total: $<? echo $GRANDTOTAL?><br />
Payment Method: <? echo $PAYMETHOD?></span><span class="TextB"><br />

我需要定义更多的变量吗？

您应该在显示Shipping&根据增加总额的手续费

if ($PAYMETHOD == $paypal)
{
    echo "Shipping & Handling = ".($GRANDTOTAL * .045);
    $GRANDTOTAL = $GRANDTOTAL * 1.045;
}
    elseif ($PAYMETHOD == $check)
{
    echo "Shipping & Handling = 0";
}