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. 8 V1 N: n* e; \* A! w: h+ z& k! N: B, C3 r' r( q0 T# P
This is just rough idea.