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.# x' O% V5 y v+ m, C0 \; n
3 b& r2 A; ]' o1 `5 w4 N- [* m* i; u
This is just rough idea.