Normally, stairway $5.00 per step, floor $5.00 per sqaure yard. As the carpeter itself depening the quality you like. Also, for the floor footage, you need add roughly 10% extra as you need to cut and through some carpeter. 5 T4 o4 s9 A. @$ D8 H+ x6 D' p: y }1 n) J. Z
This is just rough idea.