/**
* Gets the total cost of all items in the invoice, using getTotal() on each Item,
* then adds tax via Invoice->getTaxRate().
*
* @var Invoice Invoice to total.
*
* @return float Total cost of the invoice.
*/
public function getTotal(Invoice $oInvoice)
{
$fTotal = 0.0;
$aItems = $oInvoice->getItems();
foreach ($aItems as $iKey => $oItem) {
$fTotal += $oItem->getTotal();
}
return $fTotal * (1.0 + $oInvoice->getTaxRate());
}
