Complex sentence: Dr. Hibbert comes along and informs Homer he needs a triple bypass and it will cost $30,000 as the Power plant does not offer health-insurance, this making Homer suffer another heart attack, which increases the price to a higher $40,000.
Split into simpler sentences: Dr. Hibbert comes along and informs Homer he needs a triple bypass and it will cost $30,000 as the Power plant does not offer health-insurance. Upon hearing this, Homer suffers another heart attack, which increases the price to $40,000.