Calculated Field - Comp Grade

I think I might have got auto modded on my last post, so will try again without what I think was the offending word (it was the name of a business object).

Very difficult to ask the question without using the offending words.

I have a report in the (spelled it backwards to see if that helps) noitacilppA boJ Business Object and struggling to return the workers comp grade at the time they entered their noitacilppA.

I want to see if a change in position would result in a "promotion".

Apologies if this is a messy way to ask but I think the use of noitacilppA might have got me modded.

Thanks

TNU