Purchase Agreements by quantity

Hi,

I have access to the Dynamics AX database (2009) to fetch data. I was wondering where I can find PurchaseAgreements for a certain quantity?

In PriceDiscTable I (Think) I find agreements per item for a certain period and price (sometimes depending on how much you purchase).

But do purchase agreements on the type "We agree to buy 10000 pcs of item A during the next year" exist?

Btw, I don't have access to Dynamics application just the database so I'm browsing from there.

Thanks!

/Martin