I do use a "reference cell" method to cut down on additional steps.
I input into cell A the reference cell
"+W8" which refers to cell W8 where the
number 400 is contained. I then input
into cell B the reference cell "+I8"
where the number 55 is contained.
I do this to cut back on constantly looking down at my sheet to see what
numbers I must input into each cell.
Ultimately, I am looking for an automated system.