When I got my flooring done, it was $8.99 per square foot (including installation). My neighbor had it done 2 years later and the price had gone down almost $2.00 per square foot. It was a natural oak floor, with 7 coats of finish and the finish had a 25 year warranty. You can get finishes that only have a 15 year warranty (stay away) which would be cheaper and those that have a 50 year warranty that will be higher. The wood also has something to do with it. Cherry, for instance, will cost more than oak. But some run of the mill, above average grade oak was $8.99 per square foot. That works out to be about $13,500 for your area.