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75.5 You purchased a stamping machine for $100,000 to produce a new line of prod- ucts. The stamping machine will be used for five years, and the expected salvage value of the machine is 20% of the initial cost. The annual operating and main- tenance costs amount to $30,000. If each part stamped generates $12 revenue, how many parts should be stamped each year just to break even? Assume that you require a 15% return on your investment. (a) 5,000 (b) 4,739 (C) 4,488 (d) 2,238