Adding a value using external formula

A

altitude2k

Basically I want a formula to just add the value of one cell and plac
it in another. This will then be added to whatever value is already i
the cell that you are adding data into.

I completely understand that this might seem pointless, but there ar
literally hundreds of cases where I'd have to change formulas. Firstl
I'm really not willing to do this, but also as this is for a shedulin
system there will be a new worksheet each week. If I can use this sor
of thing to use a reference from just one sheet and add it to eac
sheet as it goes, instead of adding the same data every single time i
will not only decrease file size (at the moment it takes approximatel
30 seconds to save), but it will also increase performance. As i
stands there have been occasions where it has taken a couple of second
just to update from value changes
 
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