Normally, stairway $5.00 per step, floor $5.00 per sqaure yard. As the carpeter itself depening the quality you like. Also, for the floor footage, you need add roughly 10% extra as you need to cut and through some carpeter. " D0 O0 X& x6 c$ b8 |5 i: J 3 f( d8 h$ w+ ]8 p1 ^2 [9 L6 lThis is just rough idea.