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 N0 k7 y; b9 I! s6 z1 V
9 x+ V6 C) j- @8 N2 i
This is just rough idea.