Can I purchase office for mac home & bus 2011 & have 2 different users run it on 2 different macs under one network? How many licenses will I need?

There are 2 of us in our small business and we can't access Microsoft office at the same time. I want to know which package we need to purchase for us to be able to run it on our own computers under the same network at the same time.

Microsoft Office for Mac Home and Business 2011

Microsoft Office for Mac Home and Business 2011

Product No Longer Available

No Answers have been submitted