Unity Calculation fails

I have the following problem that I am despairing of, and that is I have a simple calculation which for whatever reason does not give the correct result. My script looks like this:

 using UnityEngine;
 using System;
 using UnityEngine.UI;
 using UnityEngine.Advertisements;
 
 public class OfflineIncome : MonoBehaviour, IUnityAdsListener
 {
     public Items OfflineItem;
     public Clicker clicker;
     public Save save;
     public Rps rps;
 
     public int MaxOfflineTime = 7200;
     public float CurrentOfflineTime;
     public float OfflineEarned;
     public float AwayFor;
     public float RewardedFor;
 
     public Text OfflineEarnedText;
     public Text AwayForText;
 
     public Button TakeButton;
     public Button DoubleButton;
 
     public GameObject OfflinePanel;
     public GameObject AdStatusPanel;
 
     public Button AcceptAdStatus;
     public Text AdStatus;
     public Text AdStatusText;
 
     DateTime currentTime;
     DateTime endTime;
 
     public double seconds;
 
     public float days;
     public float hours;
     public float minutes;
     public float secs;
 
 #if UNITY_IOS
     private string gameId = "4124812";
 #elif UNITY_ANDROID
     private string gameId = "4124813";
 #endif
 
     bool testMode = true;
     public string myPlacementId = "rewardedVideo";
 
     private void Start()
     {
         Advertisement.Initialize(gameId, testMode);
         Advertisement.AddListener(this);
 
         DoubleButton.GetComponent<Button>();
         DoubleButton.interactable = Advertisement.IsReady(myPlacementId);
         if (DoubleButton) DoubleButton.onClick.AddListener(ShowRewardedVideo);
     }
 
     void ShowRewardedVideo()
     {
         Advertisement.Show(myPlacementId);
     }
 
     public void OnUnityAdsReady(string placementId)
     {
         if (placementId == myPlacementId)
         {
             DoubleButton.interactable = true;
         }
     }
 
     public void OnUnityAdsDidFinish(string placementId, ShowResult showResult)
     {
         if (showResult == ShowResult.Finished)
         {
             OfflineEarned *= 2;
             clicker.Radiation += OfflineEarned;
             AdStatusPanel.SetActive(true);
             AdStatus.text = "Ad finished successfully";
             AdStatusText.text = "You earned: " + OfflineEarned.ToString("F2") + " Radiation";
         }
         else if (showResult == ShowResult.Skipped)
         {
             //Kein Reward
         }
         else if (showResult == ShowResult.Failed)
         {
             AdStatusPanel.SetActive(true);
             AdStatus.text = "Ad failed";
             AdStatusText.text = "The ad did not finish due to an error!";
         }
     }
 
     public void OnUnityAdsDidError(string message)
     {
 
     }
 
     public void OnUnityAdsDidStart(string placementId)
     {
 
     }
 
     public void Accept()
     {
         AdStatusPanel.SetActive(false);
     }
 
     public void Take()
     {
         clicker.Radiation += OfflineEarned;
         OfflinePanel.SetActive(false);
     }
 
     public void Started()
     {
         //rps.CalculateRadiationPerSecond();
         OfflinePanel.SetActive(true);
         currentTime = System.DateTime.Now;
         long temp = Convert.ToInt64(PlayerPrefs.GetString("sysString"));
         endTime = DateTime.FromBinary(temp);
         TimeSpan difference = currentTime.Subtract(endTime);
         //string TimeText = string.Format("{0:D2}:{1:D2}:{2:D2}:{3:D2}", difference.Days, difference.Hours, difference.Minutes, difference.Seconds);
 
         seconds = difference.TotalSeconds;
 
         days = Convert.ToSingle(difference.Days);
         hours = Convert.ToSingle(difference.Hours);
         minutes = Convert.ToSingle(difference.Minutes);
         secs = Convert.ToSingle(difference.Seconds);
 
         if (seconds >= MaxOfflineTime)
         {
             //For testing 
             Debug.Log("Offlinetime > MaxOfflineTime");
             Debug.Log("MaxOfflineTime: " + MaxOfflineTime);
             Debug.Log("Rp/s: " + rps.RadiationPerSecond);
             Debug.Log("OfflineIncome: " + OfflineItem.OfflineIncome);
             Debug.Log("OfflineEarnedBefore: " + OfflineEarned);
 
             OfflineEarned = (MaxOfflineTime * OfflineItem.OfflineMultiplier) * rps.RadiationPerSecond;
 
             Debug.Log("OfflineEarnedAfter: " + OfflineEarned);
         }
         else if (seconds < MaxOfflineTime)
         {
             //For testing
             Debug.Log("OfflineTime < MaxOfflineTime");
             Debug.Log("seconds: " + seconds);
             Debug.Log("Rp/s: " + rps.RadiationPerSecond);
             Debug.Log("OfflineIncome: " + OfflineItem.OfflineIncome);
 
             OfflineEarned = (float)seconds * (rps.RadiationPerSecond * OfflineItem.OfflineIncome);
         }
 
         if(days > 0)
         {
             AwayForText.text = days + "d " + hours + "h " + minutes + "m " + secs + "s";
         }
         else if( hours > 0)
         {
             AwayForText.text = hours + "h " + minutes + "m " + secs + "s";
         }
         else if (minutes > 0)
         {
             AwayForText.text = minutes + "m " + secs + "s";
         }
         else if (secs> 0)
         {
             AwayForText.text = secs + "s";
         }
 
         OfflineEarnedText.text = OfflineEarned.ToString("F1") + " Radiation";
         //AwayForText.text = TimeText;
     }
 
     public void Double()
     {
         OfflinePanel.SetActive(false);
     }
 
     private void OnApplicationQuit()
     {
         PlayerPrefs.SetString("sysString", System.DateTime.Now.ToBinary().ToString());
         Debug.Log("Saving this time: " + System.DateTime.Now);
     }
 
     private void OnApplicationPause(bool pause)
     {
         if (pause)
         {
             PlayerPrefs.SetString("sysString", 
             System.DateTime.Now.ToBinary().ToString());
             Debug.Log("Saving this time: " + System.DateTime.Now);
         }
     }
 }
 

The error is in the calculation of offlineincome once seconds > Maxofflinetime. The calculation should be as follows according to the console output: OfflineEarned = (MaxOfflineTime(7200) OfflineItem.OfflineMultiplier(1)) rps.RadiationPerSecond(1); However, the result is always 18000, which makes no sense in my eyes. I will also add a screenshot of the console.