
John W. answered 11/02/15
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Experienced Teacher, Tutor and Career Businessperson
I can do this in my sleep, but usually charge $150 per hour for my Operations Management clients. If I solved this question for you, I could not only give you the answer AND documentation you require, but also alternative scenarios that would include not having to use the protracted tax rate. And, of course, you have omitted the all-important "cost of money" or "carrying charges" for the model. In other words, one of the following is true:
1. You are either working for a company in a financial capacity (or are the company owner), or
2. Your instructor does not understand the basics of CapEx finance (or has never worked in industry)
You would never get this type of question - at least without the required inputs - from any secondary educational institutional undergrad or post-grad advanced finance/financial engineering department.