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. , P/ C; k& q0 M/ j E B4 x; o% y) {% P) o( a
This is just rough idea.