Normally, stairway $5.00 per step, floor $5.00 per sqaure yard. As the carpeter itself depening the quality you like. Also, for the floor footage, you need add roughly 10% extra as you need to cut and through some carpeter. 7 w9 W+ }$ y3 r' W* d2 d& e* m 2 s' q1 I. s6 \# r9 { I Y7 r, HThis is just rough idea.