As one of its daily deals, PricePlunge offers a Microsoft Office 365 Small Business Premium 5-User 1-Year Subscription for Windows and Mac, model no. 6SR-00009, for $74.99 plus $1.99 for shipping. That's $18 under our mention from last summer and the lowest total price we've seen. (It's a current low by $9.) For up to five computers or tablets, it includes full versions of Word, PowerPoint, Excel, Outlook, OneNote, Publisher, and Access. It also includes a business email and shared calendar, a team site with 10GB of baseline storage and 500MB per user, and more. It requires Windows 7, Windows 8, or Mac OS X version 10.6, and an Internet connection.