diff --git a/app/Classes/Modules/Transactions/Processors/CheckStorageInvoiceTransactionProcessor.php b/app/Classes/Modules/Transactions/Processors/CheckStorageInvoiceTransactionProcessor.php
index 1e98267d..7e244a62 100644
--- a/app/Classes/Modules/Transactions/Processors/CheckStorageInvoiceTransactionProcessor.php
+++ b/app/Classes/Modules/Transactions/Processors/CheckStorageInvoiceTransactionProcessor.php
@@ -267,6 +267,9 @@ class CheckStorageInvoiceTransactionProcessor
         $transactionDetailsItems = $transaction->transactionDetails()->get();
         $cbm = 0.00;
         foreach ($transactionDetailsItems as $tdItem){
+            if (in_array($tdItem->reference, ['PAY_ON_BEHALF', 'CUSTOM_CHARGES'])) {
+                continue;
+            }
             $quantity = $tdItem->quantity;
             if($tdItem->price < 0.00){
                 $quantity = $quantity * -1;