Help bidding a job

[fflawns]

I have a Church that would like to get a bid for mowing, it has approx. 12 acres, it is pretty flat, with the normal amount of trimming, around parking lot, ditch, sidewalk, etc. Not many things in the way, can someone tell me about what they charge for A job like this, I live in a small N. of Kansas City, but would like to get estimates from all different states!
Thanks,
FFLAWNS