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. % N# b/ j* K0 q/ }' { ( v, L4 x9 j8 j: E7 uThis is just rough idea.