Offset Formula in Separate Workbook

Hi there

I am using two separate workbooks and would like to offset a cell in Workbook B by one row. The problem is that I need to offset the formula (which references Workbook A) within the cell, and not the cell itself.

E.g. Cell AC4 in Workbook B should reference the formula in Cell S4 in Workbook B and offset it by one row.
The formula in Workbook B Cell S4 is ='[WorkbookA]LocationName'!$B$31
so
The formula in Workbook B Cell AC4 should therefore return the result from ='[WorkbookA]LocationName'!$B$32

Hope this is clear. If anyone could help I would be very grateful.

Thanks!