Alex & Co is considering the replacement of an antiquated machine in its Submarine Division with a book value of $20,000 and original cost of $55,000 that has been slowing down production because of breakdowns and added maintenance. The operations manager estimates that the current machine still has 2 more years of possible use but could be sold for $5,000. Estimated repairs for the current machine are $2,500 over the next two years. The machine produces an average of 50 units per day at a cost of $6.50 per unit, whereas other similar machines are producing twice that much. The units sell for $8.50. Sales are equal to production on these units, and production runs for 260 days each year. The replacement machine would cost $55,000 and have a 2-year life. Repairs on the new machine over the next 2 years are estimated to be $500. Part 3: Requirements (show your work or no credit will be given) A. Prepare an analysis to determine if Alex should replace the existing machine. B. What costs are irrelevant to the decision as to retain or replace the machine?