You are evaluating a potential work cell setup. It is a mill operation that runs for $15$

minutes. The operator spends $21/2$ minutes removing the finished part and putting a new

piece in the fixture. The worker is paid $$15/$hr$.$ You have estimated that the worker would

spend $45$ seconds traveling from one machine to another. The accountants predict that each

mill will cost $$25/$hr to run. Based on lowest cost, how many machines should you use in

your cell if you only use the one worker? What would happen to the cost if you reduced

setup time by $30$ seconds?

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