RW Engineering has a machine with four years remaining useful life and is considering a replacement that have a four-year useful life and a cost of $102,000. This new machine is expected to reduce both fixed and variable costs. Currently, fixed costs are $62,000 and variable costs are $43,000. With the new machine fixed costs are estimated to be $49,000 and variable costs will be $28,000. If the old machine has no sale or scrap value, production levels will remain unchanged, and all costs listed are annual costs, what should RW do? Why?