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. 6 V8 l8 h5 H& U $ ?4 o S* Y. z" [2 i* LThis is just rough idea.