Granfield Company has a piece of manufacturing equipment with a book value of $47,500 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 $165,000 and receive $28,000 in return for trading in its current equipment. The current equipment has variable manufacturing costs of $54,000 per year. The new equipment will reduce variable manufacturing costs by $26,500 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 $31,000 decrease $106,000 increase $16,500 decrease $72,250 increase $31,000 increase