feat: dynamically calculated total price

closes #8698xuzaa

src/BusProNet/Model/Booking.php

@@ -64,8 +64,10 @@ class Booking
         });
     }
 
-    public function getTransportationServiceForParticipantAndDirection(int $participantIndex, string $direction): ?Service
-    {
+    public function getTransportationServiceForParticipantAndDirection(
+        int $participantIndex,
+        string $direction
+    ): ?Service {
         foreach ($this->transportationServices as $service) {
             if ($service->direction !== $direction) {
                 continue;
@@ -131,6 +133,17 @@ class Booking
         });
     }
 
+    public function getCalculatedTotalPrice(): float
+    {
+        $totalPrice = 0.0;
+
+        foreach ($this->participants as $index => $participant) {
+            $totalPrice += $this->getPriceForParticipant($index);
+        }
+
+        return $totalPrice;
+    }
+
     public function isEditable(): bool
     {
         return $this->travelDate > new \DateTimeImmutable() && false === in_array($this->status, ['S', 'U']);