Janko Wellspring incorporated has a pump with a book value of $30,000 and a four-year remaining life. A new, more etficient pump is avollable ot a cost of $51,000. Janko can recelve $8,600 for trading in the old pump. The old machine has variable manufacturing costs of $31,000 per year. The new pump will reduce variable costs by $11,500 per year over its four-year life Should the pump be replaced? Multipie Choice Yes, because income will increase by 53.600 in total Yes, because income will increase by $3.600 per year