Normally, stairway $5.00 per step, floor $5.00 per sqaure yard. As the carpeter itself depening the quality you like. Also, for the floor footage, you need add roughly 10% extra as you need to cut and through some carpeter. + _9 f" z: n0 [/ ~7 S( E; I 8 u8 Q" @# Z7 A7 a0 s+ l _This is just rough idea.