Need help copying the result of a formular only if possible

[Buzz Local#30]

Is there a way to copy the result of a formular only from one sheet to
another sheet and have it add to the previous number entered in that cell?

 

[Earl Kiosterud]

Copy the cell, then at the target cell, do Paste Special (right-click for it) - Values and
Add.

 

[Pete_UK]

Select the cell with the formula in, click <copy>, click on the tab
for the destination sheet, select the cell that you want to amend,
click on Edit | Paste Special | Values (check) | Add (check) | OK then
<Esc>.

Hope this helps.

Pete