PLEASE HELP ME

Starling Co. is considering disposing of a machine with a book value of $24,300 and estimated remaining life of five years. The old machine can be sold for $5,200. A new high-speed machine can be purchased at a cost of 66,100. It will have a useful life of five years and no residual value. It is estimated that the annual variable manufacturing costs will be reduced from $22,800 to $19,400 if the new machine is purchased. The five-year differential effect on profit from replacing the machine is a(n) a increase of 43.900 b. decrease of 543,900 c. Increase of $57,070 Od decrease of $57,070