Data Comparison Check - Updating Cases

Hi there

The issue I have at hand is 2 fold, I need to check for missing data in the attached file, using the SKU code, as well as the “Brand_Price” column.
The data in the 2 tabs is flipped (Thanks Mike7952), meaning one record can appear in multiple rows, I have highlighted one example (see attached sample file).

You will note that in ‘Data 2’ for the record ‘956711’, there are some values under Brand price that are reading “0” while in ‘Data 1’ they have values – This basically means someone did not update that SKU Code.

I would like to have a macro that checks in “Data 1” under the “SKU_code” tied in to the “Outlet Code” and returns results for cases with a null value i.e. if “Data 2” has a null value for SKU code for that particular Outlet code (956711) while in “Data 1” it has a value, then the cells should be highlighted.

The second bit, which is secondary really, I would like in column M, under “Total Stock”, if this value in “Data 2” is greater than “Data 1” by 50% or less than “Data 1” by 50%, then this should also be highlighted.

Many Thanks