diff --git a/app/Classes/Modules/Bookings/Services/CalculatesBookingCurrencyAverageRate.php b/app/Classes/Modules/Bookings/Services/CalculatesBookingCurrencyAverageRate.php
index 6e09b6fa..da3fe0b4 100644
--- a/app/Classes/Modules/Bookings/Services/CalculatesBookingCurrencyAverageRate.php
+++ b/app/Classes/Modules/Bookings/Services/CalculatesBookingCurrencyAverageRate.php
@@ -31,7 +31,7 @@ class CalculatesBookingCurrencyAverageRate
 
         }
         else if ($type == TransactionType::BILL) {
-        	return $booking->transactions()->payments()->complete()->transactions->sum('original_amount') / $booking->transactions()->payments()->complete()->transactions->sum('amount');
+        	return $booking->bills->sum('original_amount') / $booking->bills->sum('amount');
         }
     }
 
diff --git a/app/Models/Booking.php b/app/Models/Booking.php
index 524e0e0c..e84c77aa 100644
--- a/app/Models/Booking.php
+++ b/app/Models/Booking.php
@@ -9,6 +9,8 @@ use App\Scopes\CustomerBookingsScope;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
 use Illuminate\Database\Eloquent\Relations\MorphMany;
 use Illuminate\Database\Eloquent\SoftDeletes;
+use Staudenmeir\EloquentHasManyDeep\HasManyDeep;
+use Staudenmeir\EloquentHasManyDeep\HasRelationships;
 
 /**
  * Class Booking
@@ -24,6 +26,7 @@ use Illuminate\Database\Eloquent\SoftDeletes;
  */
 class Booking extends AbstractModel implements Documentable, Transactionable
 {
+    use HasRelationships;
     use SoftDeletes;
 
     protected $table = 'bookings';
@@ -94,6 +97,14 @@ class Booking extends AbstractModel implements Documentable, Transactionable
         return $this->MorphMany(Transaction::class, 'owner');
     }
 
+    /**
+     * @return hasManyDeep
+     */
+    public function bills(): hasManyDeep
+    {
+        return $this->hasManyDeepFromRelations($this->transactions(), (new Transaction())->transactions());
+    }
+
     protected static function booted()
     {
         if (auth()->user()) {