Normally, stairway $5.00 per step, floor $5.00 per sqaure yard. As the carpeter itself depening the quality you like. Also, for the floor footage, you need add roughly 10% extra as you need to cut and through some carpeter. & `4 H# T2 R7 J0 L- I0 E" _% ` 4 ~- S$ e f: B* J6 M3 WThis is just rough idea.