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. ; M; i& I" f1 m8 Y) a0 k+ a2 Y) {9 s0 D* ?4 W2 j' y
This is just rough idea.