Planet Design Services, Inc., is considering replacing a machine. The following data are available: Replacement Machine $510,000 6 0 Original cost Useful life in years Current age in years Book value Disposal value now Disposal value in 6 years Annual cash operating costs Old Machine $630,000 12 6 $350,000 $122,000 $0 $102,000 $0 $59,000 Which of the data provided in the table is a sunk cost? A. the original cost of the old machine B. the disposal value of the old machine C. the annual cash operating costs of the old machine D. the annual cash operating costs of the replacement machine