Not taking into account opportunity cost of projects/work I missed out for essays and travel. I've spent about $750 and will probably spend another $300 or so.
I didn't spend much on gmat prep, I quite honestly spent 3 weeks studying for it and used it as my gauge for how much potential I had to do in an mba program. I'm applying to top 40 but not top 15 schools, meaning I never had to pay an application fee. If I had gotten less than a 650 I was going to re-evalute my goals.
$250 - GMAT Test
$100- Road Trip to K-Flager to see how I liked the culture.
$200- flight to Phoenix to interview with W.P. Carey, staying with a friend in Phoenix 2 nights and being put up by ASU one night.
Still will need to spend
$100 recommendation gifts
$100 road trip to Vanderbilt to decide if I prefer it to the other schools I've been admitted to.
$100 bar tab the night I pick my grad school.