Hi,

I need to develop a macro which has to first identify and then calculate
between two sheets. I just started to learn to program macros so please help
me with this one (as it seems far to complex to do that on my own).

Details:
The macro starts in sheet1 in row 3 takes the values in this row of column
A, C, D and compares them with sheet2 with the same columns but any row. If
the values match the macro should go on and subtract the values in Column M
in sheet2 from sheet1 and output the result in Column N in row 3 in sheet1.
If the macro does not find a match of row 3 of sheet1 in sheet2 it should go
on to the next row in sheet1 and start with the comparison of column A, ...
and so on.

Many thanks for any support!!