Not an accountant or a mathematician, pt 4 reminded me of an issue I had dealing with numbers in a table. The annoying thing that happens with SUBTRACTION (i.e.

Not an accountant or a mathematician, pt 4 reminded me of an issue I had dealing with numbers in a table. The annoying thing that happens with SUBTRACTION (i.e. the process that generates negative numbers) is 2 milion - 2 million and 2 - 2 both give the same result. What is lost, is whether a big change has happened or a small change. And sometimes when change happened I didn't want to loose that info so I used addition instead and put it in a "special" column.