Tommy - when we have had folks in our place full-time w/ AC on, it has run right at $1000BZ per mo. I'm not sure how a condo compares to single-family home, but it is not quite 1400 sq ft. Good guess, JZB!
I would guess in the middle of summer, it may cost a bit more.
In comparison, w/ folks there full-time in the winter w/ minimal AC usage, it is more like $400BZ per mo.