Yeah, this was completely my bad. Any chance you'd like to proof future posts for stupid mistakes like this? :P I joke, but I'm writing 2-4k words per week, and the sheer number of simple arithmetic calculations makes it tough to catch even big mistakes.

Seriously, though, if you know of a way to proof posts (services, forums, etc), I'd be interested. What I need is an editor as a service. The blog is just a hobby, so I can't afford a real professional editor.