NullRefrenceException - Cant find the cost

Questions & Answers
1

What is wrong? It cant acess the cost in TowerScript (ts) threw TowerSpot:

bm.selectedTower.GetComponent<.TowerScript>().cost

using UnityEngine;

public class TowerSpot : MonoBehaviour
{

void OnMouseUp()
{
    Debug.Log("TowerSpot Clicked!");

    BuildingManager bm = GameObject.FindObjectOfType<BuildingManager>();
    if(bm.selectedTower != null)
    {
        ScoreManager sm = FindObjectOfType<ScoreManager>();
        //cost cant be found! FIXME!
        if(sm.money < bm.selectedTower.GetComponent<TowerScript>().cost)
        {
            Debug.Log("Not enough money");
            return;
        }

        sm.money -= bm.selectedTower.GetComponent<TowerScript>().cost;

        

        Instantiate(bm.selectedTower, transform.position, transform.rotation);
        Destroy(transform.gameObject);
    }
}

}

using UnityEngine;

public class BuildingManager : MonoBehaviour {

public GameObject selectedTower;

}

using UnityEngine;

public class TowerScript : MonoBehaviour
{

public int cost = 5;

}

2

sorry for wasting your time. I found the problem and now it is working.