void Update()
 {
     if (productIdEnum == ProductIdEnum.Banana1)
     {
         int nextTimeToWatch = AdUtil.GetNextTimeToWatch();
         if (nextTimeToWatch == 0)
         {
             costInCentsTxt.text = "Watch Ad";
         }
         else
         {
             string nextTimeToWatchFormatted = TransformTime(nextTimeToWatch);
             costInCentsTxt.text = "Next Ad in " + nextTimeToWatchFormatted;
         }
     }
 }
    public void Buy()
    {
        if (productIdEnum == ProductIdEnum.Banana1 && AdUtil.GetNextTimeToWatch() == 0)
        {
            bool successfulAdShown = false;
            menuAudioManager.PlayMainButtonClick();
            successfulAdShown = ShowAd();
            if (successfulAdShown)
            {
                iapWindowDisplay.SetActive(false);
            }
        }
        else
        {
            bool successfulBuy = false;
            if (productIdEnum == ProductIdEnum.Banana2)
            {
                successfulBuy = iapManager.Buy100Bananas(this);
            }
            else if (productIdEnum == ProductIdEnum.Banana3)
            {
                successfulBuy = iapManager.Buy250Bananas(this);
            }
            else if (productIdEnum == ProductIdEnum.Banana4)
            {
                successfulBuy = iapManager.Buy500Bananas(this);
            }
            else if (productIdEnum == ProductIdEnum.Banana5)
            {
                successfulBuy = iapManager.Buy1000Bananas(this);
            }
            else if (productIdEnum == ProductIdEnum.Banana6)
            {
                successfulBuy = iapManager.Buy2000Bananas(this);
            }

            if (successfulBuy)
            {
                menuAudioManager.PlayBuyButtonClick();
                iapWindowDisplay.SetActive(false);
            }
        }
    }