A civil engineer who owns his own design/build/operate company purchased a small crane 3 years ago at a cost of $65,000. At that time, it was expected to be used for 10 years and then traded in for its salvage value of $10,000. Due to increased construction activities, the company would prefer to trade for a new, larger crane now, which will cost $80,000. The company estimates that the old crane can be used, if necessary, for another 3 years, at which time it would have a $18,000 estimated market value. Its current market value is estimated to be $31,000, and if it is used for another 3 years, it will have M&O costs (exclusive of operator costs) of $21,000 per year. Determine the values of P, n, S and AOC that should be used for the existing crane in a replacement analysis. a. The value of P is $
b. The value of n is
c. The value of S is $
d. The AOC value is $ per year.