Your company needs a machine for the next seven years, and you have two choices. Machine A: costs $113000 and has an annual operating cost of $31000. Machine A has a useful life of seven years and a salvage value of $15600 at the end of 7 years. Machine B: costs $233000 and has an annual operating cost of $5000. Machine B has a useful life of five years and no salvage value. However, the life of machine B can be extended by two years with a major overhaul. If machine Bs life is extended, it will still cost $5000 annually to operate and still have no salvage value. What is the maximum amount that you would pay at the end of year 5 to extend the life of machine B by two years? Use AEC method. Assume an annual interest rate of 8.3%.