crane company has a factory machine with a book value of $$86,000$ and a remaining useful life of $7$ years. It can be sold for $$30,900.$ A new machine is available at a cost of $$429,700.$ This machine will have a $7-$year useful life with no salvage value. The new machine will lower the annual variable manufacturing costs from $$576,000$ to $$459,000.$ Prepare an analysis showing whether the old machine should be replaced or retained.