Be sure to include the cost of Internet Service access, too. Those make $99 a year to be small-potatoes.
I'm still looking for 'new services' in all of these upgrades. I haven't done much more on a word-processor now than I did 20 years ago, although having the ability to do Word Balloons for User Manuals is a great feature in a word processor instead of a desktop-publisher. That's the new service that Office95 offered over WP 6.
Everything else seems cosmetic. I like being able to do a SAVE TO PDF, but that's called a PRINT TO function, not a more correct concept of SAVE TO.
What new services are people producing from Office 2007 or 2010 or 2013 that they weren't doing in OfficeXP, 2000, 2003? (Or even 95-98)?