diff --git a/app/Classes/Modules/Bookings/ControllersLogic/CreateProformaInvoiceTransactionLogic.php b/app/Classes/Modules/Bookings/ControllersLogic/CreateProformaInvoiceTransactionLogic.php
index 98b25504..b37019a5 100644
--- a/app/Classes/Modules/Bookings/ControllersLogic/CreateProformaInvoiceTransactionLogic.php
+++ b/app/Classes/Modules/Bookings/ControllersLogic/CreateProformaInvoiceTransactionLogic.php
@@ -54,6 +54,7 @@ class CreateProformaInvoiceTransactionLogic extends AbstractControllerLogic
      * @param Request $request
      * @return JsonResponse
      * @throws \App\Classes\Exceptions\AccessForbiddenException
+     * @throws \App\Classes\Exceptions\MalformedRequestException
      * @throws \App\Classes\Exceptions\RequestValidationException
      */
     public function logic(Request $request) : JsonResponse
diff --git a/app/Classes/Modules/Transactions/Processors/CreateProformaInvoiceTransactionProcessor.php b/app/Classes/Modules/Transactions/Processors/CreateProformaInvoiceTransactionProcessor.php
index 21f9885f..398b0de3 100644
--- a/app/Classes/Modules/Transactions/Processors/CreateProformaInvoiceTransactionProcessor.php
+++ b/app/Classes/Modules/Transactions/Processors/CreateProformaInvoiceTransactionProcessor.php
@@ -123,7 +123,9 @@ class CreateProformaInvoiceTransactionProcessor
             ->where('type', TransactionType::PAYMENT)
             ->first();
 
-        $booking_currency_average_rate = $this->calculatesBookingCurrencyAverageRate->execute($booking, TransactionType::PAYMENT);
+        $totalPayment = $booking->fix_currency_id === 1 ? $booking->transactions()->payments()->complete()->sum('original_amount') :
+            $booking->transactions()->payments()->selectRaw('sum(amount - service_charge - tax) as sub_total')->get()->sum('sub_total');
+        $booking_currency_average_rate = $this->calculatesBookingPayableAmount->execute($booking, $booking->fix_currency_id) / $totalPayment;
 
         $total_service_charge = $booking->transactions()
             ->where('type', TransactionType::PAYMENT)