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. & m/ Q: P9 W% J* o" d* e# \6 e2 ?% g, F. w; ]
This is just rough idea.