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. / g) ]. {& o! I 5 m3 S' ^# Z3 `* w6 q7 aThis is just rough idea.