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 ~: B2 m& s6 j/ f: P* e
* q( Y& ~- r& @# H9 h9 o* `1 n0 L
This is just rough idea.