to display the line item total, use;
<?php echo WA_eCart_DisplayMoney($<YourCartName>, $<YourCartName>->DisplayInfo("TotalCompPrice")); ?>
to display the grand total, use:
<?php echo WA_eCart_DisplayMoney($<YourCartName>, $<YourCartName>->TotalColumn("TotalCompPrice")); ?>
where <YourCartName> is the name of your eCart object.