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. 0 K8 a( S: V! ]5 \ G/ E4 _6 u& Y0 i/ D
This is just rough idea.