Go into the VB Editor (Alt-F11) and then choose Insert, Module to place a new
module in your workbook. Paste the following into it and then you can use
=LastSheet(A1)+LastSheet(A2) etc.

Function LastSheet(cellref) As String
LastSheet = Worksheets(Worksheets.Count).Range(cellref.Address )
End Function


"L.K." wrote:

Hi all,

I have workbook with the spreadsheets "Input", "Year 1", "Year 2", "Year 3",
.....
Workbook has different number of spreadsheets. Last spreadsheet name is
"Year 5" or "Year 6" or "Year 7" ... and it depends how many spreadsheets
are in workbook.

On the first sheet "Input" I have formula which refers to the last
spreadsheets cells (sometimes it is "Year 7" and sometimes "Year 9" ... and
so on).
Let this formula is:
='Year 7'!A1+'Year 7'!B1

How I can write universal formula (or macro) there instead concrete
spreadsheets names will be reference to the last spreadsheet name (sometimes
it is "Year 6", sometimes "Year 9" and so on) of workbook.

Thank you in advance.
Best wishes,
Lado