How to buy multiple Lion licenses from the Mac App Store?

Question

I need to install Mac OS X 10.7 Lion on about 10 company workstations.

If those were my personal computers, I could simply buy one license and then log into the Mac App Store on each workstation to download the installer.

But since according to the EULA I need to purchase 10 licenses, I wonder how to do that using a single Mac App Store account (Apple ID)? Is it at all possible to buy multiple licenses for an app on the Mac App Store?