When answering questions requiring calculation of NPV, IRR etc, is it okay to do the calculations using a financial calculator and then simply writing down the entries that I have entered in the calculator or I have no choice but to show the manual calculations using the manual formulae?
You don’t have to show manual calculations but if you only show a result which is wrong, no marks can be awarded for workings. If the method used in your calculation is shown then you might get some marks even if your result is incorrect.