The function does not work as expected. How to fix it?

Question

C++ / C#

Hello, I made it so that you could specify the price of the product and the bonus in the unit itself (I do it according to this guide https://www.youtube.com/watch?v=WOd22Az66SY&t=712s . This moment starts at about 14:00). Did everything right. I indicated both the price and the bonus, but when buying an improvement with enough funds, it gives an error in the log (Insufficient funds). The code:

[Header("Работа")]
    private int workersCount;
    public int [] rabotaCena;
    public int [] rabotaBonus;


    public void workPan_addClickerScore(int index)
    {
        if (score >= rabotaCena[index])
        {
            bonus += rabotaBonus[index];
            score -= rabotaCena[index];
        }
        else
        {
            Debug.Log("Ошибка");   
        }
          }

Screenshots:


If anything, I'm new to game development. Do not judge strictly.