4) Kotter's relevant range is 60,000 machine hours to 120,000 machine hours. At 80,000 machine hours, total overhead was $223,000, including variable utilities of $48,000, fixed amortization of $60,000, and mixed maintenance cost. At 100,000 machine hours, mixed maintenance cost was $130,000. If next month's machine hours are 110,000, how much will overhead be? (4 marks)