Thanks to cocobuying from hotukdeals.
If your employer is participating in this, you should be able to buy Microsoft Office 2016 for $15, which can be installed on upto 2 home computers (Mac/PC).
You can go to the deal URL and provide your work email to check whether you are eligible. Even if you do not know your "Program Code," you can still proceed.
Please note that if you go to the deal URL before 7th Oct, you will be able to get Office 2013 only. To get Office 2016, please attempt purchase only on or after 7th Oct.
Also Microsoft code for 15% off is vtf7znqg2 (not sure if it works but I'm including just in case)
Update 8/10: Available now for purchase/download.