Once you know the keywords, operators, and functions you want to use, you can define a formula by selecting a cell in the Formula column of the spreadsheet and entering the formula into the text editing box.
If your recipe has a value that is repeatedly reused, you may find it helpful to represent the value with a variable at the top of the spreadsheet. While you do not have to keep variables at the beginning of the spreadsheet, doing so makes maintaining and customizing a recipe easier.
