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) B/ p8 R# @; x D1 O7 Q! P4 \; p/ Z- K) Y w) k
This is just rough idea.