About how much would my electricity bill be each month in this case?

I have a 2.5 ton tempstar air conditioner for a 1400 sq. foot home. No shade what so ever. Only me and my wife live in the home. The home is a new construction bought last year. I live in Nashville, TN so it does get pretty humid here. If I keep my air conditioner set at 73 degrees all month keeping in mind that it will run most of the day expect for maybe shutting off a few times at night about how much would my electric bill be? Don't have to be exact, just getting an average amount based on what I've just said. I hear it's cheaper to run it longer any way than to have it cycle on and off every few mins. like some slightly oversized units. Thanks.