What is the difference between cash flow and operating income, in terms of analyzing capital investments? Why does cash flow take priority over operating income in some calculations, while operating income takes priority over cash flow in other calculations? Provide an example of a situation when one would look at cash flow over operating income. Then provide an example of when one would look at operating income over cash flow. Please ensure that your response is substantive (minimum 250 words), includes all requirements as set forth above, is grammatically accurate, and also cites or references any outside sources you utilize in preparing your response.