Normally, stairway $5.00 per step, floor $5.00 per sqaure yard. As the carpeter itself depening the quality you like. Also, for the floor footage, you need add roughly 10% extra as you need to cut and through some carpeter. 2 ?( M5 h3 y9 q' S! j. f" q) c6 U$ {, a% X$ Q7 D; D
This is just rough idea.