We all have to start somewhere, I can still (just about) remember struggling with an early version of Excel many years ago and discovering that things like copy and paste of formulas was far from straight forward. Excel is a non-intuitive application. That means that it is not at all clear, looking at the grid of cells with all the stuff on the ribbon at the top, how to start. Putting data in the cells is easy, but how do you do and mathematics, how do you do more than “AutoSum” the data? In fact all you have to do is type = in a cell and that cell is now a pocket calculator that can take its inputs from other cells by clicking on the other cells.