A gear broaching machine of the type shown in Figure 30-20 can do the gear in 15

Question:

A gear broaching machine of the type shown in Figure 30-20 can do the gear in 15 seconds (about 240 parts per hour). How many additional gears per year are needed to cover the broaching tooling cost if each broach on the machine cost $250?
Do you think the broach tool life is sufficient to handle that number of parts? What about TiN coating the broaches (cost $10.00 per broach)?