Standard big box pole frame barn. 30 x 45 feet. One large sliding door 12 x 8. One man door 36 x 80. One window 24 x 36. Built on level grade. Concrete to be poured after erection. Barn costs approximately $6500 with tax. Concrete pad will run / with labor about $ 5400. What would be an approximate cost for labor of putting up building only?