Problem 2: A company plans to purchase a new 3-spindle deep-hole drilling machine at a cost of $300,000. The efficiency with which is the three spindles can be employed is 90% because it will not always be possible to drill three holes simultaneously. Tool-changing time per drill will be 2 min, and the remaining costs will be the same as for the old machine described in Problem 10 in Chapter 6. Calculate, for the new machine a) The total cost per hole, in dollars, if the machine is operated at the present drill speed of 20 rev/s (b) The drill speed, in lens. to give minimum cost per hole (c) The total coat, in dollars, per hole under minimum conditions