public function calc_percentage($rate_id, $status_id, $amount)
{
$rate = new TaxRate();
$rate->load($rate_id);
// If no rate supplied then return zero
if (!$rate->isLoaded()) {
return 0;
}
$rate_percentage = $rate->percentage;
$status = new TaxStatus();
$status->load($status_id);
// If no status supplied then by default apply tax
if (!$status->isLoaded()) {
$status->apply_tax = 't';
}
if ($status->apply_tax === 't') {
$percentage = $rate_percentage;
} else {
$percentage = 0;
}
return bcdiv($percentage, 100, 4);
}
