When you add a qualifying computer (just about anything not ChromeOS), iPad or tablet to your cart, a 1-year Office 365 Personal subscription will be added automatically.
In fact, the DigiLand 7″ 8GB Black Tablet is $49.99 + Free Office 365 (essentially a free tablet and $20 off Office 365). (If you are going to get Office 365, you might as well get it $20 off and with an essentially Free Android tablet.)
There are also some nice iPad Mini 3 Sales happening now which stack the free $70 Office with up to $130 off Apple Retail prices giving a total of $200 off the package.
FTC: We use income earning auto affiliate links. More.