Normally, stairway $5.00 per step, floor $5.00 per sqaure yard. As the carpeter itself depening the quality you like. Also, for the floor footage, you need add roughly 10% extra as you need to cut and through some carpeter. , Z3 L9 o1 b. @5 ?. Q : [: ~' D$ s* p% c$ DThis is just rough idea.