Code error :/

Questions & Answers
1

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class itembuy : MonoBehaviour
{

public click click;
public UnityEngine.UI.Text itemInfo;
public float cost;
public int count = 0;
public int clickPower;
public string itemName;
private float _newCost;

void Update()
{
    itemInfo.text = itemName + "

Cost :" + cost + "
Power: +" + clickPower;
}

public void PurchasedUpgrade()
{
    if (click.ki >= cost)
    {
        click.ki -= cost;
        count += 1;
        click.kiperclick += clickPower;
        cost = Mathf.Round (cost * 1.15f);
        _newCost = Mathf.Pow(cost, _newCost = cost);

}

}

Idk whats wrong

2

the problem is here
click.ki -= cost;