Xinhong Company is considering replacing one of its manufacturing machines. The machine has a book value of $42,000 and a remaining useful life of 4 years, at which time its salvage value will be zero. It has a current market value of $52,000. Variable manufacturing costs are $33,600 per year for this machine. Information on two alternative replacement machines follows. Calculate the total change in net income if Alternative A is adopted. (Cash outflows should be indicated by a minus sign.)