float GetTotal(OnlineShopCartItem givenItem)
    {
        float total = 0;

        OnlineShopCartItem[] items = GetComponentsInChildren <OnlineShopCartItem>() as OnlineShopCartItem[];
        foreach (OnlineShopCartItem item in items)
        {
            if (item != givenItem)
            {
                total += item.price;
            }
        }
        return(total);
    }
    public void RefreshTotalPrice(OnlineShopCartItem givenItem)
    {
        float total = GetTotal(givenItem);

        totalPriceText.text = total.ToString("F2") + "€";
    }