"Historical" question about Basic

Hello,

This post may be a bit off-topic, so I apologize for this to everyone who

thinks so...

I'm taking part in a competition in computing and today I was given the

following question:

*

In December 1990 Microsoft sold a round amount of Microsoft BASIC, how many?

*

I searched for the answer on the Internet for a long time, but frankly

saying, I found nothing about this....

I thought about checking it in some books (about history of Microsoft or

Basic, or something like "Business fast as a thought" by Gates), but I don't

have any which would match this question...

Could someone help?

Thanks much,

Tomek

PS. I have to answer this problem in five hours....