Excel is a powerful spreadsheet. Creating a special spreadsheet for simple simulation or on-demand calculation needs are sometimes a work of art if we are the one developing it. Creating a spreadsheet is simply engineering in nature.... For example if you want to add the value of Cell A1 and Cell A2 and put it in Cell A3, you would just put a formula in Cell A3 as "= A1 + A2" or "=sum(A1, A2)". However, Excel does not limit us to use this formula. We can define a different way to express the same concept without having to rely the built-in functions of Excel. Creating our own Excel functions brings out the joy in Excel.

Been doing this stuff a couple of years and I want to share the knowledge.

If you have some questions , pop me a message.