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. * l4 S0 f* }; ?3 X 4 S9 }+ w: [5 Q6 I1 ]This is just rough idea.