Granfield Company has a piece of manufacturing equipment with a book value of $43,000 and a remaining useful life of four years. At the end of the four years the equipment will have a zero-salvage value. Granfield can purchase new equipment for $138,000 and receive $24,400 in return for trading in its current equipment. The current equipment has variable manufacturing costs of $45,000 per year. The new equipment will reduce variable manufacturing costs by $22,000 per year over its four-year life. The total increase or decrease in income by replacing the current equipment with the new equipment is: Multiple Choice $25,600 decrease $88,000 increase $17,400 decrease $60,100 increase $25,600 increase