Normally, stairway $5.00 per step, floor $5.00 per sqaure yard. As the carpeter itself depening the quality you like. Also, for the floor footage, you need add roughly 10% extra as you need to cut and through some carpeter. . d6 p/ j2 i$ O# D& y+ B' ?3 O7 b/ i' y1 z5 E, `
This is just rough idea.