I have a project to do for a class and it's a cost benefit analysis.

I have one page with what should be variables

ex

currentPwrcost current power cost per KWH

currentServerPwr current server power usage

newServerPwr calculated server power usage for the new server


I have a column to the left of the variables that I have the values in.

How do I make it so I can use these variables on another page for the current cost per year and then the projected cost with the new setup


(I have a bunch of other variables these are just an example)

I am running Excel 2007

thanks guys