Two answers one in Excel and one in a Text box
You must provide a full answer with explanation and accompanied with the calculation done manually and one done in Excel. See the example below.
1.    Manual answer as if you were answering the question in an exam (but typed). Include a time line or cash flow map/table, an explanation of the logic used to arrive at the answer, the formula used and then the calculations. The formula on its own followed by the answer is not enough.
2.    You must also do the solution in Excel. Typing the answer as a number into excel is not enough.
Do all the assignment with explanations in excel and upload one file. Type your explanation and