Normally, stairway $5.00 per step, floor $5.00 per sqaure yard. As the carpeter itself depening the quality you like. Also, for the floor footage, you need add roughly 10% extra as you need to cut and through some carpeter. 5 `" T9 N8 G9 \+ ?* k/ b" I) p; T# A2 n# L$ c- A* o" D: @
This is just rough idea.