A grocery store is evaluating a proposal to acquire self-checkout registers for its locations. The new registers would cost $60,000 and reduce annual operating costs by $25,000, excluding depreciation. The store believes the new registers will have an economic life of four years and have no salvage value. The current cash registers have a book value of $35,000, a remaining operating life of five years, and a salvage value of $0. What is the net advantage or disadvantage of replacement of these registers? Note: Enter any net disadvantage as negative. $