public function getDetalleCostosAttribute() { $str = "Sub Total: " . Helper::tm($this->sub_total) . '<br>'; $str .= "Monto Excento: " . Helper::tm($this->monto_excento) . '<br>'; $str .= "Monto IVA ({$this->impuesto}%): " . Helper::tm($this->monto_iva) . '<br>'; $str .= "Monto Total: " . Helper::tm($this->monto_total); return $str; }