Customer complaints trending spread sheet

Hello excel wizz kids, thanks for reading.

I am creating a consumer complaints trending spread sheet on excel 2010. I have a tab for each week showing a table with columns for;

Number Affected, Product and Complaint Type.

There is around 30 complaints per week and a total of 25 or so complaint types. Similar complaints are grouped under one heading to facilitate trending, e.g 'smells bad', 'bad smell' and 'smells off' are all grouped as 'bad smell'.

Lastly I have a tab called trending. This tab has one column for week number and one for each of the 25 or so complaint types.

Now here comes the clever bit (or probably not so clever for you lot right?!).

What I require is that when the complaint types are inputted in to the weekly tabs, the corresponding cell on the trending tab by week and complaint type increases by one.

(Please note: I mentioned earlier that there is a column called 'number affected' on each of the weekly tabs - no need to factor this in to the equation. Whether there are 1 or 100 bottles affected I only want it recorded as one complaint on the trending tab.) [/

Answers on a post card (or a forum). Hope I made myself clear.

Thanks really.

Nick