Running total no longer running the total? The app is running but the total is no longer adding minutes.

    while (keepGoing)
    {

      // Prompt user for minutes exercised
      Console.Write("Enter how many minutes you exercised or type \"quit\" to exit: ");
      string entry = Console.ReadLine();

      if (entry == "quit")
      {
        keepGoing = false;
      }
      else
      {
        int minutes = int.Parse(entry);

        if (minutes <= 10)
        {
          Console.WriteLine("Better than nothing, am I right?");
        }
        else if (minutes <= 30)
        {
          Console.WriteLine("Way to go hot stuff!");
        }
        else if (minutes <= 60)
        {
          Console.WriteLine("You must be a ninja warrior in training!");
        }
        else
        {
          Console.WriteLine("Okay, now you're just showing off!");
        }

        // Add minutes exercised to total
        runningTotal = runningTotal + minutes;

        // Display total mintues exercised to the screen
        Console.WriteLine("You've entered " + entry + " minutes");
      }
      // Repeat until user quits
    }
    Console.WriteLine("Goodbye");

  }
}