Normally, stairway $5.00 per step, floor $5.00 per sqaure yard. As the carpeter itself depening the quality you like. Also, for the floor footage, you need add roughly 10% extra as you need to cut and through some carpeter. G7 r/ h0 p6 b- H/ j' r: A I, Y& j1 e$ B* f( ~This is just rough idea.