[rules-users] is this kind of App right for DROOLS?

[Learning BRMS]

Hi people...

I need to solve a problem on my work and I would hear from you if Drools
could help us... 

I have two kinds of "connected by flatfile" systems that register our
products selling transactions. 

We need to match dayly every selling transaction against both systems
and to track any difference for every store. 

An transaction could happens on system A and not and system B and
vice-versa and on different dates or times (connection problems could
delay the synchronizing). 
The transaction mostly have the same ID, but there are manual
transactions too with no id only date and values... 

For each situation I have to fire a different action resolution (today
we have humanhand resolution).

We should have an 1 million of transactions by day to process... 

Today we are using a sql script to do reports that will be humanly
analyzed... 

I want to change this picture as soon as possible...

Could Drools help us with this kind of analyze, and support this volume
of objects? 

How many objects could we have on working memory at same time for that
match?

Thanks a lot for any comments

Kris