/**
* Get the discount amount for the invoice.
*
* @return float|null
*/
public function amountOff()
{
if (isset($this->discount->coupon->amount_off)) {
return $this->billable->formatCurrency($this->discount->coupon->amount_off);
}
}
/**
* Get the currency for the billable entity.
*
* @return string
*/
protected function getCurrency()
{
return $this->billable->getCurrency();
}
/**
* Get the total for the line item.
*
* @return float
*/
public function total()
{
return $this->billable->formatCurrency($this->amount);
}