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. & ~6 V( T1 M/ I# [. V1 I9 Z0 o 4 A; e. m: C6 B* u# kThis is just rough idea.