Sooky has a spotter truck wh a book value of $43,000 and a remaining useful ife of five years. At the end of the five years the spotter truck will have a zero-salvage value isocky can. purchase a new spotter truck for $123,000 and receive $31,300 in refurn for trading in its old spotter truck. The old spotter truck has varlable manulacturing costs of $78,000 per yeats the new spotter truck will reduce variable manufactuting costs by $25,300 per year over the five-year ise of the new spotter truck. The total increase or decrease in income by replacing the current spotter truck with the new truck is: Musple choce S3t 300 decresse \$34800 increase $123000 decrease s31300 inciene