Merged in afiqhamzah/fix/add-missing-helper-method (pull request #65)

Add default value

app/Services/Reports/RingkasanHarianService.php

@@ -562,7 +562,7 @@ class RingkasanHarianService
 
         $total = $tunai->sum('baki');
 
-        $totalBakiAkhirTunai = $vault['bakiakhir'];
+        $totalBakiAkhirTunai = $vault['bakiakhir'] ?? 0;
 
         if ($total != 0) {
             $totalBakiAkhirTunai = $vault['bakiakhir'] + $total;
@@ -844,6 +844,8 @@ class RingkasanHarianService
                 ->where('tarikh', '>', $tarikhMulaTawarruq)
                 ->sum('amaun');
 
+            $totalSerahan = 0;
+
             if ($this->startDate <= $tarikhMulaTawarruq) {
                 $serahanpkblama = imbangdugalama::on($this->connectionCawangan)
                     ->sum('serahan_pkb');