Basic elementary school arithmetic has proven to be beyond the mastery of Yahoo! writers. Now we see that even writing a number is just too hard for one Yahoo! Style writer:
Who writes like that? Who speaks like that? First, if you have to spell out part of the number (and why would you?), at least use thousand and not thousands. (B) Every style guide I’ve ever seen dictates that numbers that large should be written using numerals, not words.