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. ) g0 r+ q% ]3 Y7 v6 N4 l( |* x* O. E7 k 7 j8 B+ n6 h6 a# s, |This is just rough idea.