Hi,
I need to use a drop-down list in a range of cells of 2 columns. In the
range of the 1st column, I'm using a simple data validation list for it's
entries, but in the 2nd column, I need to get a list with some conditions.
For example:
If A1= Costs
B1 only can be ('aaa', 'bbb' or 'ddd')

If A1= Income
B1 only can be ('ccc', 'eee' or 'fff')

At the moment, at the Data Validation Settings (Source:), I'm using IF
conditions, but the formula is getting too large (and I need to insert more
conditions), I've tried to use SUMPRODUCT but it gives me an error!

Can you help me? Thanks
Nuno Belo