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. " \' @* o' I7 o' T- N- W' Z/ d: [6 M9 t, f0 M* x* b
This is just rough idea.