A manager is considering investing in a new machine that costs $2.5 million.He identifies four uncertain variables: sales,fixed costs,advertising costs and the life of the new machine.The required rate of return is 15% p.a.Given the following information,determine which variable is most sensitive to changes or errors: 
Definitions:
Editorial
A newspaper or magazine article that expresses the opinions of its editors or publishers, typically on topical issues.
Factual
Based on facts; real or true, rather than speculative or based on opinions.
Opening Sentence
The first sentence in a document or a paragraph that introduces the main idea or argument.
Warning Signs
Indicators or signals that alert individuals to potential dangers, problems, or the need for caution.
Q9: Shares of company stock awarded after a
Q17: _ is a situation where sexually offensive
Q19: According to the Sarbanes-Oxley Act of 2002,criminal
Q22: Disparate impact exists if an employer gives
Q26: The difference between the opportunity cost of
Q34: The net present value method differs from
Q38: Risk aversion implies that:<br>A)an investor will prefer
Q42: To invest funds,available only in the short
Q42: Under the Modigliani and Miller dividend irrelevance
Q54: Calculate EPS if a company,with 1 million