Merge pull request #89 from khalidmaquilang/hotfix/si-99-total-amount-without-vat

SI-99 | Hotfix | fix total amount when there is no vat

Author: khalidmaquilang

app/Filament/Resources/SaleResource.php

@@ -358,15 +358,18 @@ public static function updateTotalAmount(Forms\Get $get, Forms\Set $set): void
         $discount = (float) str_replace(',', '', $get('discount'));
         $discountType = $get('discount_type');
 
-        if (empty($subTotal) || empty($vatField)) {
+        if (empty($subTotal)) {
             $subTotal = 0;
         }
 
         if (! empty($discount)) {
             $subTotal = self::calculateAfterDiscount($subTotal, $discount, $discountType);
         }
 
-        $vat = $subTotal * ($vatField / 100);
+        $vat = 0;
+        if (! empty($vatField)) {
+            $vat = $subTotal * ($vatField / 100);
+        }
 
         $set('formatted_total_amount', number_format($subTotal + $vat, 2));
         $set('total_amount', $subTotal + $vat);