The manager of Think-Smart, Inc. is considering a proposal to replace a machine currently used in production with a new one at a cost of $700,000. The following yearly comparative data has been gathered: The old machine has a current book value of $300,000, and a current salvage value of $250,000. Both machines have comparable remaining service lives of four years and have expected salvage values at the end of their service lives of $10,000. (Ignore income taxes and the time value of money.) What is the net advantage (disadvantage) of replacing the old machine? a. $80,000 b. ($500,000) c. ($130,000) d. ($380,000) e. None of the above