Hi.
I have a billing system using Excel 2003 and I stored all my invoice files (
about 1000) into a folder.

I would like to analysed data from this files set. For example I'd like to
know:

how many bills are headed to the customer "A"?
What about the sales of the customer "A"?
How many times I sold the items "X" to the customer "A"?
How many times I sold the items "X" to all my customer?

Some data fied are stored in the same cell for all the files ( i.e.
"Customer Name" field is in E13 for all my bills).

How can I do this?
Excel? Acces? Any suggestions? Some experiences?

I've no idea from where I start...:-)

Thank you.