Janko Wellspring Inc. has a pump with a book value of $39,000 and a 4-year remaining life. A new, more efficient pump, is available at a cost of $60,000. Janko can also receive $9,500 for trading in the old pump. The new pump will reduce variable costs by $13,500 per year over its four-year life. The costs not relevant to the decision of whether or not to replace the pump are: Multiple Choice $39,000. $13,500. $19,000. $54.000. $9,500