To manage or control money output to make sure that the company does not oversell or overbuy products/inventory.

Overselling definitions:
http://www.thefreedictionary.com/overselling
(Business / Commerce) (tr) to sell more of (a commodity) than can be supplied


http://www.yourdictionary.com/business/oversell
To promise more than can be delivered. For example, a salesperson in an appliance store may oversell the performance of a plasma television in an effort to earn a large sales commission.

Overbuying definitions:
http://www.thefreedictionary.com/overbuying
To buy in excessive amounts.

http://www.merriam-webster.com/dictionary/overbuying
transitive verb: to buy in excess of needs or demand


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Note added at 3 hrs (2010-06-28 01:54:19 GMT)
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Excuse me Hana, our neighbor rang our doorbell to give us some egg fruit from her garden. :-)

To continue, sometimes "overselling" can be as problematic as "underselling" because it can put a burden on the company with 1) trying to rush production or 2) deliveries can be so late that even cancellations can arise. And, there are many other problems related with overselling, so "overselling" is a concern that needs to be managed, controlled or supervised.

"Overbuying" is another problem that needs to be managed. Overbuying of parts (excess of parts in inventory) can become dead stock, etc and it ties up the company's money unnecessarily.

The ideal is to control buying and selling in order to avoid the problems of "overselling/overbuying.

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Note added at 4 days (2010-07-02 05:02:34 GMT) Post-grading
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Thank you, Hana!　I'm glad I could help.

Well, an "egg fruit" looks a bit like a mango but is a much darker yellow and is shaped like a big, fat "comma" because it has a long, curved pointed tip.

The inside is looks like a boiled egg yolk. That's why they have the name "egg fruit."

They're slightly soft inside, have a big dark pit (which you take out), and you can scoop the fruit out a spoon.

When you put egg fruit in your mouth, it's like eating a cake....Like “文明堂のカステラ” but denser. And, best of all, it’s natural!

They're really special and yummy. :-)


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Note added at 4 days (2010-07-02 05:04:22 GMT) Post-grading
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Oops, I made some mistakes. :-P
"The inside looks like a boiled egg yolk."
and
"...you can scoop the fruit out with a spoon."