Normally, stairway $5.00 per step, floor $5.00 per sqaure yard. As the carpeter itself depening the quality you like. Also, for the floor footage, you need add roughly 10% extra as you need to cut and through some carpeter. 7 w7 a9 h9 V. Q$ ?9 ^9 |+ ?* j. E& v/ S* e) G: u$ S
This is just rough idea.