The doc contains calculation results for 25 questions. The letters " X " and "?" represent the variable that needs to be solved. The last column contains the calculation results. There are a few errors in the results column (please do not ask me how many ernors there are, this is for you to figure out), find them and provide the correct ones. Key in your answers in the text box. Make sure you include the index number of the question with error and the correct result. Single Cash Flow